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CPA
Intermediate Leval
Economics May 2019 Suggested Solutions

Economics
Revision Kit

QUESTION 1a

Q (i) Explain the Keynesian liquidity preference theory of demand for money.

(ii) Outline criticisms of the theory in (a) (i) above.
A

Solution


(i) The Keynesian liquidity preference theory of demand for money

Developed by economist John Maynard Keynes, focuses on the role of money as a store of value and a medium of exchange. According to this theory, individuals and businesses hold money for three primary motives:

(a) Transactionary motive: Money is held to facilitate day-to-day transactions. People need money to make purchases and pay for goods and services.
(b) Precautionary motive: Money is held as a precautionary measure to meet unforeseen expenses or emergencies. It serves as a buffer to handle unexpected financial needs.
(c) Speculative motive: Money is held as a store of value to take advantage of future investment opportunities. Individuals may choose to hold money rather than invest it if they anticipate a decline in asset prices or uncertain economic conditions.

Keynes argued that the demand for money is influenced by the interest rate. As the interest rate decreases, the cost of holding money decreases, leading to an increase in the demand for money. Conversely, as the interest rate increases, the opportunity cost of holding money rises, resulting in a decrease in the demand for money.

The theory suggests that the equilibrium interest rate is determined at the point where the supply of money equals the demand for money. If the supply of money exceeds the demand for money, people will seek to hold fewer money balances, leading to an increase in spending and investment. Conversely, if the demand for money exceeds the supply of money, people will attempt to increase their money balances, leading to a decrease in spending and investment.

(ii) Criticisms of the Keynesian liquidity preference theory include:

(a) Narrow focus on interest rates: Critics argue that the theory places excessive emphasis on interest rates as the sole determinant of the demand for money. Other factors, such as income, wealth, and expectations, may also significantly influence people's decision to hold money.
(b) Neglect of other assets: The theory assumes that money is the only asset held by individuals for speculative purposes. However, individuals also hold other assets like bonds, stocks, and real estate, which can compete with money as stores of value.
(c) Uncertainty and behavioral factors: The theory does not fully account for the role of uncertainty and psychological factors in influencing the demand for money. People's attitudes towards risk and their expectations about future economic conditions can impact their willingness to hold money.
(d) Simplistic view of investment decisions: The theory suggests that people hold money instead of investing it when they anticipate a decline in asset prices. Critics argue that investment decisions are more complex and influenced by various factors, including profitability expectations, technological advancements, and business confidence.
(e) Inadequate treatment of financial institutions: The theory assumes a direct relationship between the supply of money and the demand for money without considering the role of financial institutions in creating credit and influencing the money supply.
(f) Inflation expectations: The theory does not explicitly address how inflation expectations affect the demand for money. Expectations about future price levels can significantly impact people's desire to hold money as a store of value.

These criticisms highlight the limitations of the Keynesian liquidity preference theory and the need to consider a broader range of factors when analyzing the demand for money.

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QUESTION 1b

Q (i) Distinguish between "perfect oligopoly" and "imperfect oligopoly"

(ii) Describe methods used in fixing prices under the oligopoly market. structure.
A

Solution


(i) "Perfect oligopoly" and "imperfect oligopoly" are two different classifications used to describe variations within the oligopoly market structure:

➧ Perfect Oligopoly:

In a perfect oligopoly, the firms in the market sell homogeneous products and have complete information about market conditions, including prices, costs, and demand. This means that all firms produce identical goods or services, and there is no differentiation between them. In a perfect oligopoly, firms compete mainly on the basis of price. This type of oligopoly resembles the characteristics of perfect competition, where there is a large number of sellers and buyers and no barriers to entry or exit.

➧ Imperfect Oligopoly:

In an imperfect oligopoly, the firms in the market sell differentiated products or services and may have incomplete information about market conditions. Differentiation can occur through branding, product features, customer service, or other factors that make firms' offerings distinct from each other. In an imperfect oligopoly, firms may engage in non-price competition, such as advertising, product innovation, or customer loyalty programs, to gain a competitive advantage. Entry barriers can exist, limiting the number of firms in the market.

The key distinction between perfect and imperfect oligopoly lies in the level of product differentiation and the extent of information available to the firms.

(ii) Methods used in fixing prices under the oligopoly market structure:

➧ Collusion: Oligopolistic firms may engage in collusion to fix prices. Collusion occurs when firms agree to cooperate rather than compete with each other. They may form cartels or enter into explicit agreements to fix prices, allocate market shares, or restrict competition. Collusive behavior allows firms to collectively exert control over the market and maintain higher prices and profits.

➧ Price Leadership: In price leadership, one dominant firm within the oligopoly takes the initiative to set prices, and other firms in the industry follow suit. The price leader is usually the largest or most influential firm with the ability to influence market conditions. The other firms monitor the price leader's actions and adjust their prices accordingly. Price leadership can be explicit or implicit, with the leader signaling its pricing intentions through various means, such as public announcements or observed market behavior.

➧ Non-price competition: Oligopolistic firms often engage in non-price competition to differentiate their products or services and gain a competitive advantage. This can include advertising campaigns, product innovation, quality enhancements, customer service improvements, or brand building. Non-price competition allows firms to capture market share based on factors other than price, reducing the need for explicit price fixing.

➧ Strategic pricing: Oligopolistic firms may employ strategic pricing tactics to gain a competitive edge. This can involve setting prices strategically in response to rivals' actions or market conditions. Strategies like predatory pricing (setting prices below cost to drive competitors out of the market) or limit pricing (setting prices low enough to discourage new entrants) are examples of strategic pricing techniques.

Note

Price fixing or collusive practices are often illegal in many jurisdictions due to their anti-competitive nature. Authorities actively monitor and enforce laws against collusion to protect consumers and ensure fair market competition.

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QUESTION 1c

Q Highlight factors that might lead to a rightward shift of the optimal point of a firm,
A

Solution


A rightward shift of the optimal point of a firm refers to a situation where the firm's optimal output or production level increases. Several factors can contribute to such a shift:

➧ Increase in demand: If there is an increase in demand for the firm's product or service, it can lead to a rightward shift of the optimal point. Higher demand may necessitate producing a larger quantity to meet customer needs and maximize profits.

➧ Technological advancements: The introduction of new technologies or improvements in existing production techniques can enhance a firm's productivity and efficiency. This can enable the firm to produce more output with the same or fewer inputs, leading to a rightward shift of the optimal point.

➧ Decrease in input costs: If the costs of inputs, such as labor, raw materials, or energy, decrease, the firm can achieve a lower average cost of production. This cost reduction allows the firm to produce a higher quantity of output at a given price, leading to a rightward shift of the optimal point.

➧ Economies of scale: When a firm experiences economies of scale, its average cost of production decreases as the scale of production increases. This can result from factors such as increased specialization, bulk purchasing, or efficient use of resources. Lower costs enable the firm to expand output and achieve a rightward shift of the optimal point.

➧ Improved managerial or organizational capabilities: If a firm improves its managerial skills, decision-making processes, or organizational structure, it can enhance its efficiency and productivity. This improvement can lead to a more optimal allocation of resources and increased output.

➧ Expansion of market access: If a firm gains access to new markets, whether through geographical expansion or entry into previously untapped customer segments, it can increase its potential customer base. Expanding the firm's market reach can create opportunities for higher sales and production levels, resulting in a rightward shift of the optimal point.

➧ Changes in government policies or regulations: Alterations in government policies, such as tax incentives, subsidies, or deregulation, can influence a firm's optimal point. Favorable policies may reduce costs or create a more conducive business environment, encouraging firms to expand production.

➧ Innovation and product differentiation: Developing new products or introducing innovative features can increase a firm's competitiveness and market demand. This can lead to higher sales and production levels, pushing the optimal point to the right.

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QUESTION 2a

Q (i) Enumerate characteristics of a free market economic system.

(ii) State advantages of a free market economic system.
A

Solution


(i) Characteristics of a free market economic system:

➧ Private ownership of resources:

In a free market system, individuals and businesses have the right to own and control property, including land, capital, and assets. This allows for the decentralized decision-making and allocation of resources.

➧ Voluntary exchange:

Transactions in a free market are based on voluntary exchanges between buyers and sellers. Both parties engage in trade willingly, seeking to maximize their own self-interests.

➧ Price mechanism:

Prices in a free market are determined by the forces of supply and demand. The interaction of buyers and sellers in the marketplace establishes equilibrium prices that reflect the relative scarcity and value of goods and services.

➧ Competition:

Free markets thrive on competition among buyers and sellers. Multiple sellers offering similar goods or services create competitive pressures that drive innovation, quality improvements, and efficient resource allocation.

➧ Profit motive:

In a free market system, individuals and businesses are motivated by the desire to earn profits. The pursuit of profit provides an incentive for entrepreneurship, risk-taking, and investment in productive activities.

➧ Limited government intervention:

A key characteristic of a free market system is minimal government interference in economic activities. Government intervention is typically limited to ensuring property rights, enforcing contracts, and preventing fraud or coercion.

➧ Consumer sovereignty:

In a free market, consumer preferences and choices shape the production and availability of goods and services. The principle of consumer sovereignty means that producers respond to consumer demand and strive to meet their preferences.

(ii) Advantages of a free market economic system:

➧ Efficient allocation of resources:

Free markets allow for the efficient allocation of resources through the price mechanism. Prices reflect the scarcity and value of goods and services, guiding producers and consumers in making decisions about production and consumption.

➧ Innovation and entrepreneurship:

Free markets foster an environment conducive to innovation and entrepreneurship. The profit motive encourages individuals to develop new products, technologies, and business models, leading to economic growth and improved living standards.

➧ Flexibility and adaptability:

Free markets are flexible and can quickly respond to changing economic conditions. Prices adjust to supply and demand changes, allowing resources to be reallocated efficiently and promoting economic stability.

➧ Variety and choice:

In a free market, consumers enjoy a wide range of products and services to choose from. Competition among firms leads to product differentiation and innovation, providing consumers with diverse options and improving quality.

➧ Higher living standards:

Free markets have historically been associated with higher living standards and economic growth. The efficiency, innovation, and productivity gains enabled by free markets contribute to increased prosperity and higher levels of income.

➧ Individual freedom:

Free markets uphold individual freedom and economic liberty. People have the freedom to engage in voluntary transactions, pursue their own interests, and make choices based on their preferences without excessive government interference.

➧ Price signals and incentives:

Prices in a free market serve as signals that communicate information about scarcity and value. They guide producers and consumers in making decisions and provide incentives for efficient resource allocation and productivity.

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QUESTION 2b

Q Summarise factors that could lead to a leftward shift of the supply curve of a commodity.
A

Solution


A leftward shift of the supply curve of a commodity indicates a decrease in the quantity of the commodity supplied at each price level. Several factors can contribute to a leftward shift of the supply curve:

➧ Increase in production costs:

If the costs of production, such as labor, raw materials, or energy, rise, it can lead to a decrease in the quantity supplied. Higher production costs reduce the profitability of producing the commodity, resulting in a leftward shift of the supply curve.

➧ Decrease in technology or productivity:

If there is a decline in technological advancements or productivity in the production process, it can reduce the efficiency of production. This leads to a decrease in the quantity supplied at each price level, shifting the supply curve to the left.

Decrease in the number of suppliers:

If the number of firms or suppliers in the market decreases, it can lead to a decrease in the overall quantity supplied. This can occur due to business closures, industry consolidation, or a decrease in the number of producers entering the market.

➧ Natural disasters or adverse weather conditions:

Natural disasters, such as hurricanes, floods, or droughts, can disrupt the production of commodities. Adverse weather conditions can impact agricultural output or disrupt transportation and supply chains, resulting in a leftward shift of the supply curve.

➧ Government regulations or taxes:

Imposition of regulations, taxes, or other government policies can increase the costs of production or restrict the ability of suppliers to bring the commodity to the market. This can reduce the quantity supplied and lead to a leftward shift of the supply curve.

➧ Changes in expectations:

If producers anticipate future increases in input costs, market demand, or other factors affecting production, they may choose to reduce current supply in order to preserve resources for future periods. This adjustment in expectations can result in a leftward shift of the supply curve.

➧ Trade restrictions or disruptions:

Imposition of trade barriers, tariffs, or quotas can limit the ability of suppliers to import or export the commodity. This can reduce the availability of the commodity in the market and lead to a leftward shift of the supply curve.

➧ Supply shocks:

Unforeseen events, such as sudden disruptions in the supply chain, changes in global commodity prices, or unexpected changes in input availability, can cause temporary or permanent decreases in the quantity supplied. These supply shocks can result in a leftward shift of the supply curve.

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QUESTION 2c

Q (i) The total cost function.

(ii) The variable cost function.

(iii) The total profit of the firm when Q = 10 units.
A

Solution


(i) Total cost function

TC = ACQ
(100 / Q - 16 + 2Q) Q
= 100 - 16Q + Q²


(ii) Variable cost function

-16Q + 2Q²

(ii) Total profit function

TR = (50 - Q)Q
= 500 - Q²
Total profit = TR - TC
50Q - Q - (100 - 16Q + 2Q²)
50Q + 16Q - Q - 20 - 100
=66Q - 3Q² - 100
Profit when output Q = 10 units
34Q - 3Q² - 100.

(66 × 10) - (3 × 10²) - 100
660 - 300 - 100 = Shs. 260 × 1000
Shs. 260,000

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QUESTION 3a

Q (i) Explain the difference between the "cardinal approach" and the "ordinal approach" to measuring utility.

(ii) Outline limitations of the cardinal approach to measuring utility.
A

Solution


(i) The cardinal approach and the ordinal approach are two different approaches to measuring utility, which is a concept used in economics to quantify the satisfaction or happiness derived from consuming goods or services.

➧ Cardinal approach:

The cardinal approach to measuring utility assigns numerical values to utility. According to this approach, utility is seen as a quantifiable and measurable concept. Under the cardinal approach, individuals can express their preferences and compare the intensity of their satisfaction or happiness levels between different goods or situations. Utility is typically measured using cardinal utility functions, and the units of utility are expressed in utils.

➧ Ordinal approach:

In contrast, the ordinal approach to measuring utility does not assign numerical values to utility. Instead, it focuses on the ranking or ordering of preferences. According to the ordinal approach, individuals can indicate their preferences and compare different options, but they cannot assign precise numerical values to the level of satisfaction or happiness. The ordinal approach only considers the relative preferences and rankings of different alternatives.

Summary

The cardinal approach assigns numerical values to utility and allows for the direct measurement and comparison of satisfaction levels, while the ordinal approach focuses on the ranking and ordering of preferences without assigning specific numerical values to utility.

(ii) Limitations of the cardinal approach to measuring utility:

➧ Subjectivity:

The cardinal approach assumes that utility can be objectively quantified, which may not be accurate. Utility is a subjective concept, and different individuals may assign different numerical values to the same level of satisfaction. This subjectivity makes the measurement of utility in cardinal terms difficult to generalize and compare across individuals.

➧ Lack of interpersonal comparisons:

Cardinal utility functions do not allow for meaningful comparisons of utility between different individuals. Since utility is a subjective experience, it is challenging to compare and aggregate utility across people using cardinal measures. This limitation hampers the analysis of social welfare and distributional issues.

➧ Difficulty in absolute measurement:

While the cardinal approach provides a framework for comparing utility levels between different alternatives, it does not offer an absolute measure of utility. Utility values are relative and cannot be interpreted as precise measures of satisfaction or happiness in a quantitative sense.

➧ Inadequate information:

The cardinal approach assumes that individuals have complete and accurate information about their preferences and can assign precise numerical values to utility. However, in practice, individuals may have limited knowledge or may struggle to express their preferences numerically, making the cardinal approach less applicable in real-world situations.

➧ Susceptibility to the scale of measurement:

Cardinal utility functions are sensitive to the scale of measurement chosen. Different scaling methods can lead to different utility values and, consequently, different conclusions about preferences. This sensitivity to scaling can undermine the reliability and comparability of cardinal utility measurements.

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QUESTION 3b

Q Highlight factors that determine the effectiveness of trade unions in a society.
A

Solution


➧ Union Density:

The proportion of workers who are union members, known as union density, plays a crucial role in the effectiveness of trade unions. Higher union density gives unions greater bargaining power and the ability to mobilize a larger number of workers, increasing their effectiveness in negotiations with employers.

➧ Legal Framework:

The legal environment in which trade unions operate significantly impacts their effectiveness. Laws related to collective bargaining, union organizing, strike actions, and labor rights can either facilitate or hinder the activities of trade unions. Protections for workers' rights and the ability to engage in collective action contribute to the effectiveness of trade unions.

➧ Collective Bargaining Power:

The ability of trade unions to negotiate favorable terms and conditions of employment through collective bargaining is essential. Strong collective bargaining power allows unions to secure higher wages, better working conditions, and improved benefits for their members.

➧ Leadership and Organizational Capacity:

Effective leadership and a well-organized union structure are crucial for the success of trade unions. Strong leadership can articulate the interests of union members, mobilize support, and strategize effectively. A well-organized union with effective internal communication and coordination enhances the union's ability to advocate for workers' rights.

➧ Public Support and Perception:

The support and perception of trade unions by the public and society at large can influence their effectiveness. Positive public support can enhance the legitimacy of union demands and create pressure on employers to negotiate in good faith. Conversely, negative public opinion or hostility can weaken the bargaining position of trade unions.

➧ Economic and Industrial Conditions:

The overall economic and industrial conditions prevailing in a society can impact the effectiveness of trade unions. Economic growth, low unemployment rates, and strong labor markets can provide favorable conditions for unions to negotiate better wages and benefits. Conversely, economic downturns or high unemployment can weaken the bargaining power of unions.

➧ Solidarity and Membership Engagement:

The level of solidarity among union members and their active engagement in union activities are crucial for the effectiveness of trade unions. High levels of member participation, support, and commitment to union goals strengthen the union's ability to advocate for workers' rights effectively.

➧ International Labor Standards and Solidarity:

International labor standards and solidarity among trade unions across borders can influence the effectiveness of unions in a society. Collaboration and support from international labor organizations and unions can provide additional resources, knowledge, and advocacy for local unions, strengthening their position.

➧ Employer Response and Industrial Relations Climate:

The response of employers to union activities and their approach to industrial relations can affect union effectiveness. Employer resistance, anti-union tactics, or hostile labor relations can pose challenges for trade unions. A positive industrial relations climate characterized by a willingness to engage in meaningful dialogue and collaboration between employers and unions can enhance effectiveness.

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QUESTION 3c

Q Discuss applications of elasticity of demand in economic decision making.
A

Solution


➦ The concept of elasticity of demand is a valuable tool in economic decision-making as it provides insights into how changes in price or other factors affect the quantity demanded of a good or service.

➢ By utilizing the concept of elasticity of demand, economic decision-makers can gain valuable insights into consumer behavior, pricing strategies, revenue projections, resource allocation, and policy-making. It enables a more informed and rational approach to decision-making, leading to better outcomes for businesses, consumers, and the overall economy.

Applications of elasticity of demand in economic decision-making:

➧ Pricing decisions:

Elasticity of demand helps businesses determine the optimal pricing strategy. If demand for a product is elastic (a small change in price leads to a proportionately larger change in quantity demanded), a price decrease can result in a significant increase in revenue. Conversely, if demand is inelastic (a change in price leads to a proportionately smaller change in quantity demanded), a price increase may lead to higher revenue. Understanding price elasticity helps firms set prices that maximize their revenue and profitability.

➧ Revenue forecasting:

By analyzing the elasticity of demand, firms can estimate the impact of changes in price on total revenue. For example, if demand is elastic, a price decrease may lead to higher sales volume and total revenue. Conversely, if demand is inelastic, a price increase may result in higher revenue despite a potential decline in sales volume. Revenue forecasting based on elasticity helps firms make informed decisions about pricing strategies and revenue projections.

➧ Tax incidence:

Elasticity of demand is useful in determining the incidence of taxes. When a tax is imposed on a good, the burden of the tax is typically shared between producers and consumers. The elasticity of demand helps determine the extent to which consumers or producers bear the burden of the tax. If demand is inelastic, consumers are less responsive to price changes, and producers can pass a larger portion of the tax burden onto consumers. On the other hand, if demand is elastic, producers may absorb more of the tax burden to avoid losing customers.

➧ Production and resource allocation:

Elasticity of demand influences production decisions and resource allocation. When demand for a particular input or resource used in production is elastic, a change in its price can significantly impact the cost of production. Firms can adjust their production processes and allocate resources accordingly based on the elasticity of demand for inputs, aiming to minimize costs and maximize efficiency.

➧ Market segmentation and product differentiation:

Elasticity of demand helps firms identify market segments and tailor their products or services accordingly. By understanding the responsiveness of different customer groups to price changes, firms can create pricing strategies and product differentiation strategies to target specific market segments. If demand is elastic for a particular segment, firms can offer lower prices or differentiate their products to attract price-sensitive customers.

➧ Investment decisions:

Elasticity of demand plays a role in investment decisions, especially when assessing the potential profitability of new projects or ventures. By analyzing the demand elasticity for a particular product or service, firms can estimate the potential sales volume and revenue generated, aiding in investment decision-making.

➧ Government policy-making:

Elasticity of demand is essential for policymakers in areas such as taxation, subsidies, and regulation. Policymakers need to understand the responsiveness of demand to policy changes to assess the impact on consumer behavior, market outcomes, and the economy as a whole. Elasticity of demand helps inform decisions related to taxation rates, subsidy allocation, and the implementation of regulations.

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QUESTION 4a

Q With the aid of a well labelled diagram, explain the equilibrium level of a firm operating under an oligopolistic market structure,
A

Solution


In an oligopolistic market structure, there are a few large firms that dominate the market. Each firm's actions can have a significant impact on the market and the behavior of other firms. The equilibrium level of a firm in an oligopoly can be explained using a diagram.

Let's consider a diagram depicting the quantity (Q) produced by a firm on the horizontal axis and the price (P) on the vertical axis.



In the diagram, the demand curve (D) represents the market demand for the product produced by the firm. The demand curve slopes downward, indicating that as the price decreases, the quantity demanded increases.

The equilibrium point (E) represents the level at which the firm operates in the market. At this point, the firm maximizes its profits by producing the quantity where marginal revenue (MR) equals marginal cost (MC). The equilibrium quantity is denoted as Qe, and the equilibrium price is denoted as Pe.

Within an oligopoly, the behavior of one firm affects the decisions and strategies of other firms in the market. The firm's decision on the quantity to produce will depend on its assessment of the likely reactions of other firms. If the firm increases its production, it can gain market share, but it risks triggering a price war or retaliation from competitors. Conversely, if the firm decreases its production, it may lose market share, but it can also avoid price competition.

The equilibrium level of the firm in an oligopoly is characterized by a delicate balance between maximizing profits and considering the strategic actions of other firms. The firm aims to find a position where it can achieve the highest possible profits while considering the potential reactions of its competitors.

It's important to note that the specific shape and positioning of the demand curve, as well as the equilibrium point, may vary depending on the market conditions, the number of firms, and the level of competition within the oligopoly.

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QUESTION 4b

Q Summarise reasons why the prices of agricultural products fluctuate more than the prices of manufactured products
A

Solution


➧ Seasonal Variations:

Agricultural products are often subject to seasonal variations in supply and demand. Factors such as weather conditions, growing seasons, and harvest cycles can result in fluctuations in agricultural production and supply. As a result, the prices of agricultural products can vary significantly throughout the year.

➧ Perishability and Storage Costs:

Many agricultural products, such as fresh fruits, vegetables, and dairy products, have limited shelf lives and require specialized storage facilities or preservation methods. The perishable nature of these products can lead to price fluctuations as supply and demand imbalances occur due to spoilage or scarcity. In contrast, manufactured products can often be stored for longer periods without significant deterioration, reducing the impact of perishability on price fluctuations.

➧ Supply Chain Challenges:

The agricultural supply chain involves multiple intermediaries, including farmers, processors, distributors, and retailers. Each stage of the supply chain can introduce inefficiencies, transportation costs, and market uncertainties, which can contribute to price volatility. In contrast, the supply chains for manufactured products are often more streamlined and standardized, leading to more stable prices.

➧ External Factors:

Agricultural products are more susceptible to external factors such as natural disasters, pests, diseases, and fluctuations in global commodity markets. Adverse weather conditions, such as droughts or floods, can damage crops and reduce supply, leading to price spikes. Similarly, outbreaks of diseases in livestock or pests in crops can disrupt production and affect prices. Manufactured products, on the other hand, are generally less exposed to these external factors, resulting in relatively stable prices.

➧ Government Policies and Subsidies:

Government policies and subsidies can have a significant impact on agricultural prices. Measures such as import tariffs, export restrictions, price support programs, and agricultural subsidies can distort supply and demand dynamics, leading to price fluctuations. These policies are often implemented to protect domestic farmers, ensure food security, or stabilize rural economies. In contrast, manufactured products are generally subject to fewer direct government interventions, resulting in relatively more stable prices.

➧ Elasticity of Demand:

The demand for agricultural products, particularly staple food items, tends to be less elastic compared to manufactured goods. People need to consume food regardless of price changes, and the demand for specific agricultural products may not be easily substituted. As a result, changes in supply can have a relatively larger impact on agricultural prices compared to manufactured products, which have more elastic demand.

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QUESTION 4c

Q Suggest policy measures that could be adopted by a government to enhance geographical mobility of labour within a country.
A

Solution


➧ Infrastructure Development:

Governments can invest in infrastructure development, particularly in transportation networks, to improve connectivity between regions. This includes the construction and improvement of roads, railways, airports, and public transportation systems. Enhanced infrastructure reduces travel time and cost, making it easier for workers to move to areas with better job opportunities.

➧ Housing and Accommodation Policies:

Governments can introduce policies that promote affordable housing options in regions experiencing labor shortages or areas with high job growth. This can be achieved through incentives for developers to build affordable housing units or the provision of subsidized housing programs for low-income workers. Accessible and affordable housing reduces one of the barriers to labor mobility.

➧ Education and Skill Development Programs:

Governments can implement education and skill development programs that are tailored to the specific needs of different regions. This can include vocational training, apprenticeship programs, or initiatives that focus on developing skills in industries where there is high demand for labor. By equipping workers with relevant skills, they become more adaptable and capable of relocating to areas with job opportunities.

➧ Employment Support Services:

Governments can establish employment support services to assist workers in finding job opportunities in different regions. These services can include job placement agencies, career counseling, job fairs, and online job portals that specifically cater to interregional labor mobility. Such support services can help workers identify employment options and facilitate their transition to new locations.

➧ Regional Development Initiatives:

Governments can implement targeted regional development initiatives to stimulate economic growth in underdeveloped regions. This can involve providing financial incentives, tax breaks, or subsidies to businesses and industries that establish operations in these areas. By creating job opportunities and improving economic prospects, governments can encourage labor mobility to these regions.

➧ Social Safety Nets:

Governments can implement social safety nets to provide assistance and support to workers who are willing to relocate but may face short-term challenges. This can include temporary financial assistance, relocation allowances, or access to healthcare and social services during the transition period. Social safety nets provide a safety net for workers and help alleviate concerns related to the costs and risks of moving to new regions.
➧ Information and Communication Campaigns:

Governments can launch information and communication campaigns to raise awareness about job opportunities, living conditions, and quality of life in different regions. These campaigns can highlight the advantages of working and living in specific areas, promoting the benefits of labor mobility and encouraging workers to consider relocation.

➧ Regulatory Reforms:

Governments can review and update regulatory frameworks that may hinder labor mobility, such as restrictive licensing requirements or occupational regulations. Streamlining these regulations and reducing barriers to entry in certain professions or industries can facilitate labor mobility and encourage workers to move more freely between regions.

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QUESTION 4d

Q (i) The average variable costs when the units produced are 2, 6 and 10 respectively.

(ii) The marginal costs of production for the 4th and 8 th units respectively.
A

Solution


(i) The average variable costs when the units produced are 2, 6 and 10 respectively.

Output Total cost Fixed cost Variable cost
0
2
4
6
8
10		 77
216
235
319
348
382		 77
77
77
77
77
77		 0
139
158
242
271
305


Average variable cost (AVC) = Total Variable Cost(TVC) / Output(Q)

AVC 2 Units = 139,000 / 2 = sh 69,500

AVC 6 Units = 242,000 / 6 = shs 40,333.33

AVC 10 Units = 305,000 / 10 = 30,500

(ii) The marginal costs of production for the 4th and 8 th units respectively.

Marginal cost (MC) is derived by calculating the change in total cost (TC) that occurs when producing one additional unit of output. Mathematically, it is expressed as:

MC = ΔTC / ΔQ

Where:

MC: Marginal cost
ΔTC: Change in total cost
ΔQ: Change in quantity of output

In words, marginal cost represents the additional cost incurred when increasing production by one unit. It measures the rate at which the total cost changes with respect to the quantity of output. By analyzing the marginal cost, firms can make decisions regarding the optimal level of production to maximize their profits.

Output Total cost Fixed cost Variable cost ΔTC
0
2
4
6
8
10		 77,000
216,000
235,000
319,000
348,000
382,000		 77,000
77,000
77,000
77,000
77,000
77,000		 0
139,000
158,000
242,000
271,000
305,000		 0
139,000
19,000
84,000
29,000
34,000


Marginal cost for the 4th and 8th units, we need to determine the change in total cost (ΔTC) and the change in output quantity (ΔQ) for each case.

For the 4th unit:

ΔTC = Total Cost at Output 4 - Total Cost at Output 2
235,000 - 216,000
19,000

ΔQ = Output 4 - Output 2
4 - 2
2

Marginal cost for the 4th unit:

MC = ΔTC / ΔQ
19,000 / 2
9,500

For the 8th unit:

ΔTC = Total Cost at Output 8 - Total Cost at Output 6
348,000 - 319,000
29,000

ΔQ = Output 8 - Output 6
8 - 6
2

Marginal cost for the 8th unit:

MC = ΔTC / ΔQ
29,000 / 2
14,500

Therefore, the marginal cost for the 4th unit is 9,500 and for the 8th unit is 14,500.

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QUESTION 5a

Q Differentiate between "demand deficient unemployment" and "disguised unemployment" as used in economics.
A

Solution


"Demand deficient unemployment" and "disguised unemployment" are two concepts used in economics to describe different types of unemployment.

Differentiation between the two:

Demand Deficient Unemployment:

Demand deficient unemployment, also known as cyclical unemployment or Keynesian unemployment, occurs when there is a lack of aggregate demand in the economy, leading to a deficiency in the demand for labor. It is typically associated with economic downturns or recessions when overall spending and economic activity decline. Demand deficient unemployment arises when firms reduce their production and employment levels due to decreased demand for goods and services. As a result, workers become unemployed because there is insufficient demand for their labor.

Characteristics:

➧ It is caused by a deficiency in aggregate demand.

➧ Unemployment is directly related to the state of the overall economy.

➧ It is considered a temporary form of unemployment that tends to decrease during economic recoveries.

➧ Policies that aim to stimulate aggregate demand, such as fiscal stimulus or monetary easing, can help reduce demand deficient unemployment.

Disguised Unemployment:

➦ Disguised unemployment refers to a situation where individuals are employed, but their work is either redundant or contributes very little to the overall output. It is commonly found in the agricultural sector or in traditional subsistence economies. Disguised unemployment occurs when there are more workers engaged in a particular activity than are actually required for efficient production. In such cases, the productivity of each worker is low because they are overcrowded in a limited productive task.

Characteristics:

➧ It is characterized by a surplus of labor in a particular sector or activity.

➧ Workers appear to be employed, but their contribution to output is minimal.

➧ Disguised unemployment is often associated with underemployment, where workers are engaged in jobs that do not fully utilize their skills and capabilities.

➧ It is typically prevalent in sectors with low productivity and limited technological advancements.

➧ Addressing disguised unemployment involves promoting structural changes, such as improving education and skills training, encouraging diversification of the economy, and promoting more productive employment opportunities.

Summary

➦ Demand deficient unemployment arises due to a lack of aggregate demand in the economy, leading to a decrease in labor demand and involuntary unemployment. Disguised unemployment, on the other hand, occurs when there is an excess of labor in a particular sector or activity, where workers are employed but make minimal contributions to overall output. While demand deficient unemployment is associated with economic cycles and fluctuations, disguised unemployment is more related to structural and sectoral issues in the labor market.

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QUESTION 5b

Q Enumerate effects of inflation on the functions of money.
A

Solution


➧ Medium of Exchange:

Inflation can impact the medium of exchange function of money. When there is inflation, the value of money decreases over time. As a result, it takes more units of money to buy the same amount of goods and services. This can lead to a loss in the purchasing power of money and make transactions more expensive. People may need to carry larger amounts of money to conduct the same level of transactions, which can be inconvenient.

➧ Unit of Account:

Inflation affects the unit of account function of money. Inflation erodes the stability of prices, making it challenging to accurately measure and compare the value of goods and services over time. Prices fluctuate, making it difficult to assess the true value of money. This can create uncertainty for businesses and individuals in planning and budgeting.

➧ Store of Value:

Inflation diminishes the store of value function of money. Money serves as a store of value when it can be held over time and retain its purchasing power. However, during periods of inflation, the value of money declines. Therefore, money held as savings or in financial assets may lose value in real terms. Inflation erodes the ability of money to preserve wealth, leading to a decrease in the store of value function.

➧ Standard of Deferred Payment:

Inflation can affect the standard of deferred payment function of money. This function refers to the ability of money to be used to settle debts and obligations over time. In an inflationary environment, the value of money decreases, which can affect the fairness and stability of long-term contracts, loans, and other financial agreements. Creditors may suffer losses as the value of money received in the future is worth less than expected.

➧ Confidence and Trust:

Inflation can undermine confidence and trust in the monetary system. When inflation is high and unpredictable, it can create uncertainty and reduce confidence in the value and stability of money. This can lead to a loss of faith in the currency, hamper economic transactions, and negatively impact overall economic stability.

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QUESTION 5c

Q Outline limitations of the theory of comparative advantage as used in international trade.
A

Solution


➧ Assumption of Constant Costs:

The theory assumes that the opportunity costs of production remain constant as resources are shifted between different industries. In reality, costs can change due to various factors such as technological advancements, changes in factor prices, or economies of scale. The assumption of constant costs may not hold true in dynamic and evolving economies.

➧ Ignoring Non-Trade Factors:

The theory of comparative advantage focuses solely on differences in production efficiency between countries and ignores other factors that influence trade patterns. Factors such as transportation costs, trade barriers, government policies, exchange rates, and non-economic factors like political considerations or cultural preferences can significantly affect trade flows. Comparative advantage alone may not fully explain observed trade patterns.

➧ Incomplete Consideration of Factor Mobility:

The theory assumes that factors of production, such as labor and capital, are immobile between countries. In reality, factors can move across borders, and the mobility of factors can impact trade patterns. The theory does not account for the potential effects of factor mobility on the distribution of income, employment, and domestic industries.

➧ Inability to Explain Intraindustry Trade:

The theory primarily focuses on interindustry trade, where countries specialize in producing different goods. However, a significant portion of international trade consists of intraindustry trade, where countries trade similar goods within the same industry. The theory of comparative advantage does not provide a clear explanation for intraindustry trade patterns.

➧ Shortcomings in the Measurement of Comparative Advantage:

The theory assumes that comparative advantage can be easily identified by comparing relative labor productivity or production costs. However, accurately measuring comparative advantage is challenging in practice, as it requires comprehensive data on productivity, costs, and technology across industries and countries. The theory oversimplifies the complexities involved in determining comparative advantage.

➧ Disregard for Income Distribution Effects:

The theory of comparative advantage focuses on the overall benefits of trade but does not explicitly consider the distributional effects of trade on income and wealth within countries. Trade can lead to winners and losers, with some industries and workers experiencing displacement or wage pressure. The theory does not provide guidance on how to address these distributional consequences.

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QUESTION 5d

Q The following data relate to the consumption function of a hypothetical economy in millions of shillings:

C = 300 + 0.6y

Where:

C is the consumption function. y is the national income.

(i) The investment function.

(ii) Discuss factors that determine the level of consumption in an economy.
A

Solution


(i) Investment function

Marginal Propensity to consume (MPC) = ΔC / ΔY = 0.6

Y = C + S
S = Y - C
and C = 300 + 0.6Y

Therefore;
Y - (300 + 0.6Y)
S = Y - 300 - 0.6Y
S = 0.4Y - 300

(ii) Factors that determine the level of consumption in an economy.

➧ Disposable Income:

Disposable income is the income available to individuals or households after subtracting taxes. Higher disposable income generally leads to higher consumption levels, as individuals have more funds available to spend on goods and services.

➧ Wealth:

Wealth represents the accumulated assets and savings of individuals or households. A higher level of wealth can positively influence consumption, as individuals may feel more financially secure and inclined to spend.

➧ Interest Rates:

Interest rates affect borrowing costs and the return on savings. Lower interest rates can stimulate consumption by reducing the cost of borrowing for big-ticket purchases like homes or cars. Conversely, higher interest rates may incentivize saving instead of spending.

➧ Expectations:

Consumer expectations about future income, employment prospects, and general economic conditions can impact consumption decisions. Optimistic expectations can lead to higher consumption, while pessimistic expectations may result in cautious spending or increased saving.

➧ Consumer Confidence:

Consumer confidence reflects the overall sentiment and perception of economic conditions among households. Higher consumer confidence tends to boost consumption as individuals feel more secure in their financial situations and are more willing to spend.

➧ Household Debt Levels:

The level of household debt, such as mortgages, student loans, or credit card debt, can affect consumption. High levels of debt may limit disposable income and constrain consumption, as individuals allocate more funds towards debt repayment.

➧ Demographics:

Demographic factors, such as population size, age distribution, and household composition, can influence consumption patterns. For example, an aging population may exhibit different consumption preferences and spending habits compared to a younger population.

➧ Government Policies:

Government policies, such as tax rates, social welfare programs, and regulations, can have significant impacts on consumption. For instance, tax cuts or income redistribution policies may stimulate consumption by increasing disposable income for certain groups.

➧ Cultural and Social Factors:

Cultural norms, social pressures, and peer influence can shape consumption behavior. For example, societal attitudes towards saving versus spending or the importance placed on material possessions can impact individual consumption decisions.

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QUESTION 6a

Q Examine roles of foreign exchange reserves in an economy.
A

Solution


➧ Facilitating International Trade:

Foreign exchange reserves serve as a means to facilitate international trade. They provide a stockpile of foreign currencies that can be used to settle payment obligations with other countries. Importers can use foreign exchange reserves to purchase goods and services from other countries, ensuring a smooth flow of international trade.

➧ Supporting Exchange Rate Stability:

Foreign exchange reserves can be used to support the stability of a country's currency exchange rate. Central banks can intervene in the foreign exchange market by buying or selling currencies to influence the value of their domestic currency. By utilizing foreign exchange reserves, central banks can stabilize exchange rates and mitigate excessive volatility.

➧ Managing Balance of Payments:

Foreign exchange reserves help manage a country's balance of payments, which is the record of its economic transactions with the rest of the world. In case of a current account deficit, where a country's imports exceed its exports, foreign exchange reserves can be used to cover the deficit and maintain stability in the external sector.

➧ Crisis Management and Financial Stability:

Foreign exchange reserves act as a cushion during times of financial or economic crises. They provide a buffer to support the stability of the financial system, boost investor confidence, and provide a defense against external shocks. In times of crisis, foreign exchange reserves can be used to stabilize currency values, meet foreign debt obligations, and ensure the smooth functioning of the economy.

➧ Sovereign Wealth Fund:

In some cases, foreign exchange reserves may be invested in diversified assets to generate income and build a sovereign wealth fund. Sovereign wealth funds can be used for long-term investments, infrastructure development, or to support future generations through savings and investment strategies.

➧ Confidence and Credibility:

Adequate foreign exchange reserves enhance the credibility and confidence in a country's monetary and fiscal policies. They signal a country's ability to meet its external obligations and withstand economic challenges. Higher foreign exchange reserves often contribute to greater investor confidence, reduced borrowing costs, and improved credit ratings.

➧ Speculative Attacks and Contagion:

Foreign exchange reserves act as a defense mechanism against speculative attacks on a country's currency. Speculators may attempt to devalue a currency by selling it in large volumes. With sufficient foreign exchange reserves, central banks can intervene in the market to counter such attacks and stabilize the currency. Reserves also act as a buffer against contagion effects from financial crises in other countries.

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QUESTION 6b

Q Describe factors that determine the terms of trade in a country.
A

Solution


The terms of trade refer to the ratio at which a country's exports can be exchanged for its imports. It is determined by various factors that influence the relative prices of exports and imports.

Factors that determine the terms of trade in a country:

➧ Relative Supply and Demand:

The relative supply and demand conditions for a country's exports and imports play a crucial role in determining the terms of trade. If a country's exports have a higher demand compared to its imports, it can negotiate more favorable terms of trade. Conversely, if a country's imports are in higher demand relative to its exports, the terms of trade may be less favorable.

➧ Productivity and Efficiency:

The productivity and efficiency levels in producing exports and imports influence the terms of trade. A country with high productivity and efficiency in its export industries can negotiate better terms of trade, as its exports are more competitive. On the other hand, if a country's import industries are inefficient, it may face less favorable terms of trade.

➧ Exchange Rates:

Exchange rates between currencies directly impact the terms of trade. A depreciation of a country's currency can improve its terms of trade, as its exports become relatively cheaper for foreign buyers, while its imports become relatively more expensive. Conversely, an appreciation of the currency can have the opposite effect on the terms of trade.

➧ Trade Policies and Barriers:

Trade policies, such as tariffs, quotas, and other barriers, imposed by a country or its trading partners can affect the terms of trade. Trade protectionism, for instance, can decrease import competition, leading to more favorable terms of trade for the protected industry. Conversely, a reduction in trade barriers can increase import competition and potentially impact the terms of trade.

➧ International Commodity Prices:

Changes in international commodity prices can influence the terms of trade for countries heavily reliant on specific commodities. For commodity-exporting countries, higher commodity prices can lead to improved terms of trade, as their exports become more valuable relative to their imports. Conversely, a decline in commodity prices can negatively impact the terms of trade.

➧ Technological Advancements:

Technological advancements can impact the terms of trade by influencing production costs and improving productivity. Countries with advanced technology and innovation capabilities may have a competitive advantage, enabling them to negotiate more favorable terms of trade.

➧ Economic Growth and Development:

The overall level of economic growth and development in a country can influence its terms of trade. As countries develop and transition to higher value-added industries, their terms of trade may improve as they shift from exporting primary commodities to exporting more sophisticated manufactured goods or services.

➧ Political Stability and Institutional Factors: Political stability, the rule of law, and the quality of institutions in a country can affect its terms of trade. Countries with a stable political environment and strong institutions tend to attract more foreign investment, enhance trade relations, and potentially improve their terms of trade.

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QUESTION 6c

Q Explain causes of high levels of external debt in developing countries.
A

Solution


➧ Borrowing for Development Projects:

Developing countries often borrow from external sources to finance infrastructure projects, such as transportation networks, power plants, or social development programs. These investments require substantial capital, and if the country lacks sufficient domestic savings, they may resort to external borrowing to fund these projects. However, if the borrowed funds are not effectively managed or the projects do not generate expected returns, it can lead to high levels of external debt.

➧ Macroeconomic Imbalances:

Weak macroeconomic fundamentals, such as persistent fiscal deficits, current account deficits, and high inflation, can contribute to high levels of external debt. When a country consistently spends more than it earns, it needs to borrow from external sources to bridge the gap. Additionally, if a country experiences high inflation, it may resort to external borrowing to maintain stability and fund its spending.

➧ Commodity Price Volatility:

Developing countries that heavily rely on commodities for export earnings can be vulnerable to commodity price fluctuations. When commodity prices decline, their export revenues decrease, and they may face difficulties in meeting external debt obligations. This is particularly evident in countries heavily dependent on commodities such as oil, minerals, or agricultural products.

➧ Adverse External Shocks:

External shocks, such as global financial crises, sudden changes in interest rates, or disruptions in international trade, can lead to increased external borrowing by developing countries. These shocks can negatively impact a country's export revenues, exchange rates, and access to capital markets, forcing them to borrow more to manage their economic stability.

➧ Currency Depreciation:

Currency depreciation can significantly increase the burden of external debt for countries that have borrowed in foreign currencies. When a country's domestic currency depreciates against the currency in which it borrowed, the repayment obligations become larger in domestic currency terms. This can result in a higher debt burden, as the country needs to allocate more resources to service its debt.

➧ Inefficient Debt Management:

Poor debt management practices, such as taking on excessive or unsustainable levels of debt, can contribute to high external debt levels. In some cases, developing countries may accumulate debt without proper assessments of repayment capacity or consideration of the risks associated with borrowing. Inefficient debt management can lead to debt overhang, debt servicing difficulties, and a cycle of further borrowing to repay existing debt.

➧ Weak Institutional Frameworks:

Weak governance, corruption, and lack of transparency can contribute to high levels of external debt. These factors may hinder effective debt management, increase the risk of embezzlement or misallocation of borrowed funds, and erode investor confidence. Such conditions can make it challenging for developing countries to access favorable borrowing terms and may result in higher borrowing costs.

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QUESTION 6d

Q Analyse functions of non-banking financial institutions in an economy.
A

Solution


➧ Intermediation:

NBFIs act as intermediaries between savers and borrowers by mobilizing funds from surplus units and channeling them to deficit units. They provide various financial products and services such as loans, leases, and investment options to individuals, businesses, and governments. By facilitating the flow of funds, NBFIs contribute to economic growth and development.

➧ Risk Management:

NBFIs offer risk management tools and products that help individuals and businesses mitigate financial risks. For example, insurance companies provide coverage against potential losses due to unforeseen events such as accidents, natural disasters, or health issues. Non-bank financial institutions also engage in hedging activities, derivatives trading, and other risk management strategies.

➧ Capital Market Operations:

NBFIs play an important role in capital market operations by facilitating the buying and selling of securities, such as stocks, bonds, and mutual funds. They provide brokerage services, investment advisory, and portfolio management services to investors, helping them allocate their capital efficiently. NBFIs also participate in underwriting new securities issuances and promoting capital market development.

➧ Financial Inclusion:

NBFIs contribute to financial inclusion by extending financial services to segments of the population that are underserved or unbanked. They offer microfinance services, including small loans, savings accounts, and insurance products to individuals and businesses in low-income or rural areas. NBFIs often have flexible eligibility criteria and customized financial products to cater to the specific needs of these underserved groups.

➧ Innovation and Diversification:

NBFIs are often at the forefront of financial innovation, introducing new financial products and services that complement or go beyond traditional banking offerings. They have the flexibility to develop tailored solutions for specific customer needs and niche markets. Examples include venture capital firms, private equity funds, factoring companies, and crowdfunding platforms.

➧ Infrastructure Financing:

NBFIs play a crucial role in financing infrastructure projects that require long-term capital investments. Infrastructure financing institutions, such as development banks or specialized financing companies, provide funds for large-scale projects such as transportation systems, energy facilities, and public infrastructure. By supporting infrastructure development, NBFIs contribute to economic growth and improve the quality of life.

➧ Risk Diversification:

NBFIs help diversify the risk in the financial system by offering alternative investment opportunities. They provide options for investors to allocate their funds across different asset classes and investment instruments, reducing concentration risk. This diversification enhances the stability and resilience of the financial system and reduces the potential impact of a financial crisis.

➧ Regulatory Arbitrage:

NBFIs often operate under different regulatory frameworks compared to traditional banks, allowing them to engage in activities and take on risks that banks may be restricted from. While this can contribute to financial innovation, it also poses challenges for regulators to ensure adequate oversight and consumer protection.

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QUESTION 7a

Q Argue cases against the use of national income statistics to compare the standards of living between countries.
A

Solution


While national income statistics are commonly used to compare the standards of living between countries, there are several limitations and challenges associated with this approach.

Arguments against relying solely on national income statistics for such comparisons include:

➧ Incomplete Measurement of Well-being:

National income statistics, such as Gross Domestic Product (GDP) or Gross National Income (GNI), provide a narrow measure of economic activity and fail to capture important aspects of well-being. They do not account for factors such as income distribution, inequality, access to healthcare, education, social services, environmental sustainability, and quality of life. As a result, countries with high GDP may still exhibit significant disparities in living standards and well-being among their populations.

➧ Ignoring Non-Monetary Factors:

National income statistics focus primarily on monetary transactions and economic production, disregarding non-monetary factors that contribute to overall well-being. Factors such as community engagement, social capital, cultural heritage, and environmental quality are not adequately captured by national income statistics but are vital for assessing the true standards of living.

➧ Variations in Price Levels:

National income statistics do not account for differences in price levels between countries. The cost of goods and services can vary significantly across nations, meaning that a direct comparison of national incomes may not reflect the purchasing power and real living standards. A higher GDP does not necessarily imply a higher standard of living if prices are also higher.

➧ Informal Economy and Shadow Activities:

National income statistics may underestimate the economic activities in the informal sector and shadow economy, which can be significant in some countries. Informal sector activities, such as small-scale subsistence farming or unregistered businesses, contribute to people's livelihoods but are often not captured in official statistics. This omission can skew the comparison of living standards, particularly in economies with a large informal sector.

➧ Cultural and Contextual Differences:

Comparing standards of living based solely on national income statistics overlooks cultural, social, and contextual factors that shape people's well-being. Different societies and cultures may have varying preferences, values, and lifestyle choices that affect how individuals perceive and experience their standard of living. The focus on monetary measures fails to capture these nuances.

➧ Data Reliability and Comparability:

Comparing national income statistics across countries can be challenging due to differences in data collection methods, accounting practices, and reporting standards. These variations can introduce biases and inaccuracies in the data, making direct comparisons less reliable. Discrepancies in data quality and availability can hinder meaningful cross-country comparisons of living standards.

➧ Distributional Considerations:

National income statistics provide an aggregate measure that does not reveal the distribution of income and wealth within a country. Two countries with similar average incomes may have vastly different income distributions, resulting in significant disparities in living standards and well-being among their populations. Focusing solely on national income statistics can overlook these distributional considerations.

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QUESTION 7b

Q With the aid of an appropriate diagram, explain the relatioaship between the short run average cost curve and the long run average cost curve.
A

Solution


➦ In economics, the relationship between the short-run average cost (SRAC) curve and the long-run average cost (LRAC) curve is depicted through the concept of economies and diseconomies of scale. Let's consider the diagram below:



In the diagram, the vertical axis represents average cost (AC), and the horizontal axis represents the quantity of output. The LRAC curve represents the long-run average cost curve, while the SRAC curve represents the short-run average cost curve.

The SRAC curve shows the relationship between average cost and the quantity of output when at least one input (typically capital) is fixed in the production process. In the short run, firms are constrained by fixed inputs, such as the size of the factory or equipment. As a result, they can experience diminishing returns to scale. The SRAC curve typically exhibits a U-shape due to economies and diseconomies of scale. Initially, as output increases, the average cost declines due to economies of scale, resulting in a downward-sloping portion of the SRAC curve. However, beyond a certain point, the firm starts experiencing diminishing returns and inefficiencies, leading to an upward-sloping portion of the SRAC curve.

The LRAC curve, on the other hand, represents the relationship between average cost and the quantity of output when all inputs can be varied or adjusted in the long run. It reflects the firm's optimal scale of operations and captures the most efficient combination of inputs. The LRAC curve is derived from different combinations of inputs, considering various scales of production. It is typically U-shaped and lies tangent to the lowest points of the SRAC curves at each level of output. The LRAC curve represents the long-run equilibrium average cost for different levels of output.

Summary

The SRAC curve shows the average cost relationship in the short run with fixed inputs, while the LRAC curve represents the average cost relationship in the long run with all inputs adjustable. The LRAC curve is a reflection of the optimal scale of operations and encompasses the lowest points of the SRAC curves at each level of output.

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QUESTION 7c

Q (i) The IS function.

(ii) The LM function

(iii) The equilibrium level of interest rate

(iv) The equilibrium level of national income.
A

Solution


(i) The IS function.

In the context of an isolated or closed economy, which does not engage in international trade through exports and imports, and where there is no government intervention in terms of government spending and taxation, the national income (Y) is equivalent to the total expenditure (E) occurring within the economy.

Therefore Y = E
E = C + 1
hence Y = C + 1
Where
Y: National income
E → Expenditure
C → Consumption spending
I → Investment

Hence,

IS Function

Y = 200 + 0.4Y + 1900 - 12r
Y = 200 + 1900 + 0.47 - 12Y
Y = 2100 + 0.4y - 12r
y - 0.4y = 2100 - 12r

0.6 / 0.6 = 2100 / 0.6 - 12r / 0.6

Y = 3500 - 20r → IS function

(ii) LM function

In money market, equilibriums is said to exist when money demand is equal to supply

MD = MDT + MDS = 0.5 + 100 - 10r

Therefore;
MD = MS
1500 = 0.5Y + 100 - 10r
0.5Y = 1500 - 100 + 10r

0.5Y / 0.5 + 1400 / 0.5 + 10r / 0.5

Y = 2800 + 20r => LM Function

(iii) The equilibrium level of interest rate

3500 - 20r = 2800 + 20r
20r + 20r = 3500 - 2800
40r / 40 = 700 / 40
r = 17.5%

(iv) Equilibrium national income solving for Y by taking the LM function.

Y = 2800 + 20r + 2800 + (20 x 17.5)
sh. 3150 million

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