2023 Cambridge IGCSE Economics (0455) Practice Paper with Answers

Percentage change in quantity supplied = \(\frac{15,000 - 12,000}{12,000} \times 100 = 25\%\). Percentage change in price = \(\frac{1.80 - 1.50}{1.50} \times 100 = 20\%\). Price Elasticity of Supply (PES) = \(\frac{\% \text{ change in Quantity Supplied}}{\% \text{ change in Price}} = \frac{25\%}{20\%} = 1.25\).

1 mark for the correct calculation of percentage changes in quantity supplied (25%) and price (20%), or for showing the correct PES formula. 0.67 marks for the correct final answer of 1.25.

Total Cost (TC) = Total Fixed Cost (TFC) + Total Variable Cost (TVC) = \(\$3,200 + \$4,800 = \$8,000\). Average Total Cost (ATC) = \(\frac{\text{Total Cost}}{\text{Quantity}} = \frac{\$8,000}{8,000} = \$1.00\).

1 mark for calculating total cost of \(\$8,000\) or for showing the correct formula for average total cost. 0.67 marks for the correct final answer of \(\$1.00\) (accept 1 or $1).

The economic term is 'external cost' (or 'negative externality'). It refers to the cost incurred by third parties as a result of an economic transaction. A common real-world example is chemical waste from manufacturing polluting a local river, which harms local residents and wildlife.

1 mark for identifying the term 'external cost' or 'negative externality'. 0.67 marks for providing a valid, relevant real-world example.

External costs are negative impacts or costs imposed on third parties who are not involved in the economic transaction (e.g., water pollution from a chemical factory damaging local fishing industries or causing health issues). Chemical producers only consider private costs (e.g., raw materials, wages) when making production decisions, and ignore these external costs. As a result, the social cost (private cost plus external cost) of producing chemicals is greater than the private cost. This leads to overproduction of chemicals relative to the socially optimal level, resulting in an inefficient allocation of resources, which constitutes market failure.

1 mark for defining or giving an example of external costs (e.g., pollution affecting third parties). 1 mark for explaining that private firms only consider private costs and ignore external costs when making decisions. 1 mark for explaining that social costs exceed private costs \(SC > PC\), leading to overproduction or overallocation of resources. 1 mark for linking this overproduction/misallocation to market failure or allocative inefficiency.

Two reasons why the PES of fresh agricultural crops is inelastic in the short run are: 1) Long production/growing time: Agricultural crops require a specific growing season and take months to harvest. If the market price increases, farmers cannot instantly increase the quantity supplied because they must wait for the crops to mature. 2) Perishability and lack of storage: Fresh crops spoil quickly and cannot be easily stored in warehouses for long periods. If market prices fall, farmers cannot easily withdraw supply from the market to store it for future sales, making supply highly unresponsive to price changes in the short run.

Award up to 2 marks for each reason explained. Reason 1 (up to 2 marks): 1 mark for identifying a factor (e.g., long production/growing time), and 1 mark for explaining why this limits the farmer's ability to adjust supply quickly when price changes. Reason 2 (up to 2 marks): 1 mark for identifying a second factor (e.g., high perishability or inability to store crops), and 1 mark for explaining why this prevents storing goods to adjust supply when prices fluctuate.

**(a) Calculation of GDP per head in 2022:**
$$\text{GDP per head} = \frac{\text{Real GDP}}{\text{Population}}$$
$$\text{GDP per head in 2022} = \frac{\$520\text{ billion}}{20\text{ million}} = \frac{\$520,000,000,000}{20,000,000} = \$26,000$$

**(b) Explanation of economic growth (2022–2023):**
Economic growth is defined as an increase in an economy's real GDP (or output) over a period of time. Looking at the data for Country Y, the Real GDP decreased from $520 billion in 2022 to $510 billion in 2023. Since output fell, Country Y did not experience economic growth; instead, it experienced negative economic growth (or economic contraction).

**(a) Maximum 2 marks:**
* **1 mark** for correct working or formula: \(520 \div 20\) or \(520,000,000,000 / 20,000,000\).
* **1 mark** for the correct answer: $26,000 (accept 26,000 or $26k).

**(b) Maximum 3 marks:**
* **1 mark** for defining economic growth (e.g., an increase in real GDP / productive capacity / real output over time).
* **1 mark** for identifying the change in the data: Real GDP decreased from $520 billion to $510 billion (or decreased by $10 billion / fell by approximately 1.92%).
* **1 mark** for concluding that Country Y did not experience economic growth / experienced negative economic growth / contraction.

Why government regulation can be the most effective way: It provides clear, legally binding boundaries that immediately stop sales to targeted groups (e.g., under 18s), reducing consumption among vulnerable groups. Unlike taxes, it does not rely on price sensitivity (price elasticity of demand); if a good is banned, consumption must drop regardless of how much consumers are willing to pay. It also sends a strong signal about the harmful nature of the product. Why government regulation may not be the most effective way: Regulation can be difficult and expensive to monitor and enforce (e.g., shops selling illegally to minors). It may lead to the creation of a shadow (informal) market where unregulated, potentially more dangerous substitutes are traded. It does not raise revenue for the government, unlike an indirect tax which can be used to fund health campaigns or treat the negative externalities. Finally, education might be more effective in the long run as it shifts the demand curve to the left permanently by changing consumer habits rather than just restricting choices.

Award up to 4 marks for logical arguments why regulation is the most effective way, and award up to 4 marks for logical arguments why it may not be the most effective way (or why alternative policies are better). Points for regulation being effective include: direct and immediate impact on consumption, not dependent on the price elasticity of demand (PED) of consumers, and protects vulnerable groups like children effectively. Points against regulation or in favour of other policies include: high enforcement and administrative costs, risk of black markets or illegal sales arising, no government revenue generated (unlike taxes), and it does not tackle the root cause of consumer preference (unlike education). Maximum of 6 marks overall. A one-sided response can gain a maximum of 4 marks.

Arguments for imposing tariffs: It protects domestic employment in the solar panel industry, preventing structural unemployment and social costs. It protects a strategic or infant industry that might be vital for the nation's green transition, allowing domestic firms to grow and achieve economies of scale. It improves the current account of the balance of payments by reducing expenditure on imports. It also generates tariff revenue for the government, which can be reinvested in public services or green energy subsidies. Arguments against imposing tariffs: It increases the price of solar panels for domestic consumers and businesses, reducing the adoption of green energy and harming environmental targets. It can lead to trade retaliation from exporting nations, who may impose tariffs on this country's exports, hurting other domestic industries. It reduces competition, which can make domestic solar panel producers inefficient, leading to lower quality and lack of innovation. Finally, it violates free trade principles and may breach international trade agreements.

Award up to 4 marks for logical arguments why tariffs should be imposed, and award up to 4 marks for logical arguments why they should not be imposed. Points for tariffs include: safeguards domestic jobs and prevents unemployment, helps infant or strategic industries to survive and grow, generates tax revenue for the government, and reduces import expenditure to improve the trade balance. Points against tariffs include: leads to higher prices for domestic buyers, invites retaliation from trading partners which harms export sectors, reduces market competition causing domestic firms to become inefficient, and limits choice or slows down the adoption of green technology. Maximum of 6 marks overall. A one-sided response can gain a maximum of 4 marks.

Public goods are non-rival and non-excludable. Common examples include street lighting, national defence, lighthouses, and flood defence systems.

1 mark for each correct public good identified (up to 2 marks). Acceptable answers include street lighting, national defence, lighthouses, flood defence, and public fireworks displays. Do not accept merit goods such as schools, hospitals, or public parks.

Internal growth occurs when a firm expands by using its own resources. Methods include buying additional machinery, hiring more staff, opening new retail stores, or developing new products.

1 mark for each correct method identified (up to 2 marks). Acceptable answers include purchasing more machinery/capital, hiring more workers, opening new branches, developing new products, and increasing marketing. Do not accept mergers, takeovers, acquisitions, or joint ventures.

The price elasticity of supply (PES) measures the responsiveness of quantity supplied to a change in price. Factors that determine PES include the availability of spare capacity, the level of stocks held, the time period under consideration, and the mobility of factors of production.

1 mark for each correct factor identified (up to 2 marks). Acceptable answers include availability of stocks, presence of spare capacity, production time, mobility of factors of production, and time period.

Trade protection refers to government policies designed to restrict international trade and protect domestic industries. Common methods include tariffs (taxes on imports) and import quotas (limits on the physical quantity of imports).

1 mark for each correct method identified (up to 2 marks). Acceptable answers include tariffs, quotas, subsidies to domestic producers, embargoes, and administrative barriers.

A subsidy is a financial grant provided by the government to producers. When applied to public transport, it reduces the operating costs of transit companies, enabling them to lower passenger fares. Lower prices increase the quantity demanded of public transport. Public transport yields significant positive externalities, including reduced air pollution and less traffic congestion on roads, benefiting non-users. Without intervention, the market allocates too few resources to public transport (underconsumption). The subsidy corrects this market failure by increasing consumption towards the socially optimal level.

Award 1 mark for explaining that a subsidy lowers the cost of production or fares of public transport. Award 1 mark for explaining that this increases demand or consumption of public transport. Award 1 mark for identifying positive externalities of public transport (such as reduced congestion or pollution). Award 1 mark for explaining that this corrects underconsumption or moves resources closer to the socially optimum level.

A trade union's ability to secure wage increases depends on its bargaining power and the employer's financial position. Firstly, if union density is low, meaning only a small proportion of the workforce are members, the union lacks collective bargaining power. The employer can easily replace striking workers or continue operations without them. Secondly, if the firm is experiencing a decline in sales, profits, or faces severe financial difficulties, it will have a limited ability to pay. Demanding higher wages in this situation might cause the firm to shut down or make workers redundant, which reduces the union's leverage during negotiations.

Award 1 mark for each of the two reasons identified (up to 2 marks) and 1 mark for each explanation (up to 2 marks). Reason 1: Low union density (1 mark) - this reduces collective bargaining power as the employer can easily replace striking workers (1 mark). Reason 2: Financial difficulties of the firm (1 mark) - if the firm is making losses, raising wages could lead to insolvency or redundancies, reducing the union's leverage (1 mark).

Price elasticity of supply (PES) measures the responsiveness of quantity supplied to a change in price. One key factor is the availability of spare capacity. If a firm has idle resources, such as unused machinery or empty warehouse space, it can rapidly expand output if prices increase, resulting in elastic supply. Another factor is the time period. In the short run, supply tends to be inelastic because it takes time to adjust production processes, hire skilled labor, or acquire capital. In the long run, all factors of production are variable, allowing firms to adjust supply fully, making it more elastic.

Award 1 mark for each of the two factors identified (up to 2 marks) and 1 mark for each explanation of how it affects PES (up to 2 marks). Factor 1: Availability of spare capacity (1 mark) - if there is spare capacity, firms can easily and quickly increase output in response to a price rise, making supply elastic (1 mark). Factor 2: Time period (1 mark) - in the short run, supply is often inelastic because some factors of production are fixed, whereas in the long run, all factors can be adjusted, making supply more elastic (1 mark).

An import tariff is a tax imposed on goods produced abroad. When applied, it increases the cost of importing, which raises the retail price of foreign goods in the domestic market. This price rise makes the products of newly established domestic firms (infant industries) more price-competitive. As a result, domestic consumers switch their purchases from foreign imports to domestic alternatives. This protection from dominant international competitors provides infant industries with the time and market share necessary to grow, improve efficiency, and achieve economies of scale, eventually allowing them to compete on equal terms globally.

Award 1 mark for defining an import tariff as a tax on foreign imports. Award 1 mark for explaining that a tariff increases the price of imported goods. Award 1 mark for explaining that this makes domestic goods more price-competitive, switching consumer demand to infant industries. Award 1 mark for explaining that this allows infant industries to grow, gain market share, or benefit from economies of scale to compete globally.

A trade union can increase the wages of its members through several methods. First, it can engage in collective bargaining, representing all workers as a single unit to increase bargaining power against employers. Second, the union can threaten industrial action, such as strikes or work-to-rule, which would disrupt production and reduce the firm's revenue, pressuring the employer to accept wage demands. Third, a trade union can negotiate productivity agreements, where workers agree to adopt more efficient working practices in exchange for higher pay. Higher productivity increases the demand for labor, driving wages up. Finally, some unions may restrict the supply of labor to a firm or industry, which naturally increases the equilibrium wage rate.

Award 1 mark for each point in a coherent chain of reasoning up to 6 marks: Collective bargaining increases workers' bargaining power (1 mark). Threat of industrial action (e.g., strike) (1 mark) can halt production and reduce firm profits (1 mark), forcing employers to concede to higher wages (1 mark). Negotiating productivity agreements (1 mark) makes labor more efficient, which increases the demand for labor (1 mark) and pushes wages up (1 mark). Restricting the supply of labor (1 mark) shifts the supply curve left, raising the wage rate (1 mark).

The price elasticity of supply (PES) measures the responsiveness of quantity supplied to a change in price. Several factors make supply price elastic (PES > 1). First, the existence of spare capacity allows firms to quickly increase production using idle machinery or empty factories when prices rise. Second, holding high levels of stocks (inventories) allows firms to quickly release products onto the market in response to a price increase. Third, a short production time means goods can be manufactured rapidly, making supply highly responsive. Lastly, high mobility of factors of production allows resources to be easily shifted from producing other goods to the product whose price has risen, allowing rapid adjustment.

Award 1 mark for each factor identified and up to 1 mark for its explanation (up to 6 marks in total): Spare capacity identified (1 mark) + explanation that idle resources can be quickly used to increase output (1 mark). High levels of stocks identified (1 mark) + explanation that goods can be quickly released to the market (1 mark). Short production time identified (1 mark) + explanation that goods can be manufactured quickly in response to price changes (1 mark). High mobility of factors of production identified (1 mark) + explanation that resources can be easily shifted from other uses (1 mark).

Merit goods, such as education and healthcare, are goods that are more beneficial to consumers than they realize. Market failure occurs in a free market because consumers suffer from information failure; they do not fully appreciate the long-term private benefits of consuming these goods, leading to low private demand. Additionally, merit goods generate positive externalities, which are external benefits enjoyed by third parties who are not directly involved in the transaction (for example, a healthier workforce increases national productivity). In a free market, individuals only consider their personal private benefits and ignore these external benefits. As a result, the market demand curve lies below the socially optimum level, leading to underconsumption. Since resources are underallocated to these goods, it results in allocative inefficiency and market failure.

Award 1 mark for each point in a coherent chain of reasoning up to 6 marks: Definition of merit goods or positive externalities (1 mark). Explanation of information failure / consumers underestimating private benefits (1 mark), leading to lower private demand (1 mark). Explanation of positive externalities (benefits to third parties) (1 mark). Explanation that private consumers ignore external benefits in their decision-making (1 mark). Link to underconsumption / underproduction in a free market (1 mark). Explanation that this leads to allocative inefficiency / failure to reach social optimum (1 mark).

An import tariff is a tax levied by the government on imported goods. When a tariff is imposed on foreign cars, it increases their cost of production, which raises their retail price in the domestic market. This makes foreign cars less price-competitive compared to domestically produced cars. Consequently, domestic consumers switch their spending from foreign imports to domestic alternatives. This increase in demand for domestic cars encourages domestic manufacturers to expand their production and output. Since labor is a derived demand, domestic firms will need to hire more workers, or retain existing ones, to meet this higher level of production, thereby protecting and increasing domestic employment in the car industry.

Award 1 mark for each point in a coherent chain of reasoning up to 6 marks: Definition/role of a tariff as a tax on imports (1 mark). Explaining that the tariff increases the price of foreign cars (1 mark). Explaining that foreign cars become less competitive / domestic consumers switch to domestic cars (1 mark). Explaining that demand for domestic cars increases (1 mark). Explaining that domestic manufacturers increase output/production (1 mark). Explaining that labor is a derived demand, so the demand for domestic car workers increases / jobs are saved (10 mark).

Government intervention can be successful through various measures: 1. Indirect taxes raise the price of demerit goods, which reduces demand, especially if the goods have some elastic demand. 2. Regulations and bans (such as age limits or bans on public consumption) legally restrict access and decrease consumption. 3. Information campaigns and education can shift consumers' preferences, leading to a long-term reduction in demand. However, there are significant limitations to these measures: 1. Demerit goods like alcohol and cigarettes are often highly addictive, meaning their price elasticity of demand (PED) is inelastic, so price increases do not lead to a significant fall in consumption. 2. Heavy taxes can lead to unintended consequences such as the growth of informal or illegal black markets, which bypass the tax and lack quality control. 3. Regulations are expensive to enforce and monitor. 4. Educational campaigns take a long time to show results and have high opportunity costs for government budgets.

Level 3 (6-8 marks): A balanced evaluation that discusses both the ways government intervention can be successful and the reasons why it may fail, supported by economic terms. Level 2 (3-5 marks): A one-sided analysis that only focuses on the benefits or the limitations of government policy, or is lacking depth. Level 1 (1-2 marks): Simple statements or identification of government policies without clear links to success or failure.

An increase in trade union strength can be beneficial for several reasons: 1. Higher wages negotiated by unions can increase workers' disposable income, boosting aggregate demand and reducing poverty. 2. Better working conditions and safety standards can increase worker morale and productivity. 3. Unions can provide training and resolve industrial disputes efficiently, reducing labor turnover. On the other hand, there are notable drawbacks: 1. Demanding wages that exceed productivity gains can increase firms' average costs, leading to cost-push inflation. 2. Higher labor costs may force firms to reduce their workforce, leading to unemployment, or to relocate to countries with cheaper labor. 3. Frequent industrial action, such as strikes, can disrupt production, reduce national output (GDP), and discourage foreign direct investment.

Level 3 (6-8 marks): A balanced discussion that evaluates both the positive macroeconomic and microeconomic effects of stronger trade unions and the potential negative consequences. Level 2 (3-5 marks): Explains only the benefits or only the drawbacks of stronger trade unions, or provides a very limited discussion of both. Level 1 (1-2 marks): General points about trade unions without clear economic reasoning.

Arguments for making agricultural PES more elastic: 1. Farmers can increase production quickly when global food prices rise, maximizing export revenues and profits. 2. Elastic supply helps stabilize domestic food prices because any change in demand can be quickly met by a change in supply, reducing price fluctuations. 3. Improving storage facilities (like refrigeration) allows farmers to stockpile goods and release them quickly when needed, reducing food wastage. Arguments against or limitations: 1. The cost of improving infrastructure, providing subsidies for refrigeration, and training farmers is high, presenting a significant opportunity cost for the government. 2. Agricultural supply is inherently limited by biological factors, such as crop growing seasons and weather conditions, which cannot be easily controlled by government policy. 3. Small-scale farmers may lack the technology to adapt quickly even with government support.

Level 3 (6-8 marks): A balanced evaluation explaining the economic benefits of elastic supply in agriculture and the practical limitations or costs of achieving it. Level 2 (3-5 marks): Explains either the benefits of elastic supply or the difficulties of making supply elastic, with limited balance. Level 1 (1-2 marks): Basic definition of PES or simple points with no clear economic connection.

Reasons to protect domestic industries: 1. Protecting infant (newly established) industries allows them to grow, achieve economies of scale, and eventually compete internationally. 2. It prevents dumping, where foreign firms sell goods below cost to destroy domestic competition. 3. It protects local employment in key sectors, preventing structural unemployment. 4. It can help improve the current account balance by reducing import expenditure. Reasons against protectionism: 1. It restricts choice and increases prices for consumers because domestic producers face less competition and may be less efficient. 2. Trading partners may retaliate by imposing their own tariffs, hurting the country's export sector and reducing overall GDP. 3. Protection can lead to domestic industries becoming permanently inefficient and dependent on government support.

Level 3 (6-8 marks): A balanced evaluation showing a deep understanding of the arguments for and against trade protection (e.g., tariffs, quotas), with clear economic links. Level 2 (3-5 marks): Explains only the benefits of protectionism or only the drawbacks, or provides a weak, superficial analysis of both sides. Level 1 (1-2 marks): Simple list of protectionist measures or basic statements about trade.