2024 Cambridge IAL Economics (9708) Practice Paper with Answers

### Part (a)(i)
- In 2021, US$1.00 = Z$1.20, so the value of Z$1.00 in terms of US dollars was \(\frac{1.00}{1.20} = US$0.8333\).
- In 2023, US$1.00 = Z$1.60, so the value of Z$1.00 in terms of US dollars was \(\frac{1.00}{1.60} = US$0.6250\).
- Percentage change in value = \(\frac{0.6250 - 0.8333}{0.8333} \times 100\% = -25.0\%\).
- The external value of the Zealandian Dollar depreciated by 25.0%.

### Part (a)(ii)
- The value of the Z$ depreciated against the US$ from 2021 to 2023.
- A depreciation means that it requires more domestic currency (Z$) to purchase the same amount of foreign currency or foreign goods.
- This directly raises the price of imported goods, such as fuel, food, and raw materials, in domestic currency terms.
- As imported inputs become more expensive, domestic production costs rise, shifting the short-run aggregate supply (SRAS) curve to the left and leading to cost-push (imported) inflation.

### Part (b)
- A tariff is an import tax that increases the domestic price of Zealandia's dairy exports in the importing nation's market.
- The PED for Zealandia's dairy exports is -1.4, which means that the demand is price elastic (\(|PED| > 1\)).
- For price elastic demand, the percentage fall in quantity demanded will be greater than the percentage rise in price.
- Consequently, the total spending on Zealandian dairy exports by foreign consumers will fall.
- The actual revenue received by Zealandian exporters will fall even further because the importing country's government will capture a portion of the total expenditure as tariff revenue.

### Part (c)
- A YED of +2.2 means imported luxury vehicles are a normal, income-elastic (luxury) good. Demand is highly responsive to changes in income.
- **During economic growth:** Real GDP and household incomes rise. Since YED is +2.2, the demand for imported luxury vehicles will rise more than proportionately (e.g., a 2% rise in income leads to a 4.4% rise in quantity demanded). This causes import expenditure to rise significantly, which, ceteris paribus, worsens Zealandia's current account balance.
- **During economic recession:** Real GDP and household incomes fall. Demand for these luxury vehicles will fall more than proportionately. This causes import expenditure to decrease significantly, which, ceteris paribus, improves Zealandia's current account balance.

### Part (d)
- **Contractionary monetary policy:**
- Works by raising interest rates (from 0.5% to 3.5% in Zealandia) or reducing the money supply.
- Higher interest rates increase the cost of borrowing and reward for saving, which dampens consumer spending and business investment, shifting Aggregate Demand (AD) to the left to control demand-pull inflation.
- However, it has time lags (typically 12-18 months) and can depress economic growth and cause unemployment.
- **Supply-side policies:**
- Focus on increasing productive capacity (shifting LRAS to the right) through education, infrastructure, deregulation, or tax incentives.
- These lower long-run unit production costs and mitigate cost-push inflation, allowing non-inflationary economic growth.
- However, they take a long time to implement and have high opportunity costs or short-run expansionary fiscal impacts that may worsen inflation temporarily.
- **Evaluation:**
- If inflation is driven by excess aggregate demand (demand-pull), monetary policy is highly effective and flexible.
- If inflation is cost-push/imported (e.g., due to Zealandia's currency depreciation raising import costs), monetary policy is less effective as it further damages economic growth. Supply-side policies are better suited to structural inflation, although a combination of both is ideal.

### Part (a)(i) [2 marks]
- **1 mark** for correct working showing the calculation of the Z$ value in US$ terms in both years (0.83 and 0.625) or setting up the percentage change formula correctly: \(((0.625 - 0.833) / 0.833) \times 100\).
- **1 mark** for the correct final answer of -25.0% (or a 25.0% depreciation/fall).
- *Note: Do not award full marks if candidate calculates the percentage change in exchange rate as \(((1.60 - 1.20) / 1.20) \times 100 = +33.3\%\), as this is the change in the price of US$ in terms of Z$, not the value of Z$ itself (award 1 mark max for this working).*

### Part (a)(ii) [3 marks]
- **1 mark** for identifying that the Z$ has depreciated/fallen in value.
- **1 mark** for explaining that depreciation increases the price of imports in terms of domestic currency (Z$).
- **1 mark** for linking this to higher costs of production (cost-push inflation) or more expensive imported finished products, increasing the consumer price index.

### Part (b) [5 marks]
- **1 mark** for identifying that demand for dairy exports is price elastic because \(|PED| = 1.4 > 1\).
- **1 mark** for explaining that a tariff will increase the price of Zealandia's exports in the foreign market.
- **1 mark** for explaining that since demand is price elastic, the percentage decrease in quantity demanded will be greater than the percentage increase in price.
- **1 mark** for concluding that total spending by foreign consumers on these exports will fall.
- **1 mark** for explaining that the revenue received by Zealandian producers falls because some of the revenue is diverted to the foreign government as tariff revenue.

### Part (c) [4 marks]
- **Economic growth (up to 2 marks):**
- **1 mark** for explaining that rising incomes lead to a more than proportionate increase in the quantity demanded / expenditure on imported luxury vehicles.
- **1 mark** for concluding that this will increase overall import expenditure and thus worsen/deteriorate the current account balance (ceteris paribus).
- **Economic recession (up to 2 marks):**
- **1 mark** for explaining that falling incomes lead to a more than proportionate decrease in the quantity demanded / expenditure on imported luxury vehicles.
- **1 mark** for concluding that this will reduce overall import expenditure and thus improve/better the current account balance (ceteris paribus).

### Part (d) [6 marks]
- **AO1 & AO2 (up to 4 marks):**
- **Up to 2 marks** for analyzing how contractionary monetary policy reduces demand-pull inflation and its limitations.
- **Up to 2 marks** for analyzing how supply-side policies reduce cost-push/structural inflation and their limitations.
- **AO3 Evaluation (up to 2 marks):**
- **1 mark** for identifying that the relative effectiveness depends on the primary cause of inflation (demand-pull vs cost-push).
- **1 mark** for a reasoned conclusion on which policy is more appropriate for Zealandia or how they can be used in tandem.

Part (a)
To make effective pricing and production decisions, a firm must understand how changes in price and income affect the demand for its products.

1. Price Elasticity of Demand (PED) measures the responsiveness of the quantity demanded of a good to a change in its price: \(PED = \frac{\% \Delta Q_d}{\% \Delta P}\).
- If a firm's product has price elastic demand (\(|PED| > 1\)), a decrease in price leads to a proportionately larger increase in quantity demanded, thereby increasing total revenue. Conversely, if demand is price inelastic (\(|PED| < 1\)), the firm should increase its price to raise total revenue because the price increase outweighs the small drop in quantity.
- During an economic recovery, knowing PED helps the firm decide whether to discount prices to gain market share or raise prices if they have strong brand loyalty.

2. Income Elasticity of Demand (YED) measures the responsiveness of quantity demanded to a change in real consumer incomes: \(YED = \frac{\% \Delta Q_d}{\% \Delta Y}\).
- An economic recovery is characterized by rising real incomes.
- If the firm produces a normal good (\(YED > 0\)), particularly a luxury good (\(YED > 1\)), demand will rise as incomes grow. The firm should plan to increase production levels and capacity to avoid shortages.
- If the firm produces an inferior good (\(YED < 0\)), demand will fall. The firm should reduce production levels and consider diversifying into normal goods to prevent unsold inventory.

Part (b)
Cross Elasticity of Demand (XED) measures the responsiveness of the quantity demanded of Good A to a change in the price of Good B: \(XED_{AB} = \frac{\% \Delta Q_{d, A}}{\% \Delta P_B}\).

In a highly competitive market with many close substitutes, XED is exceptionally valuable:
- Close substitutes have a high positive XED (\(XED > 0\)). If a competitor cuts its price, the demand for the firm's product will fall significantly.
- Knowledge of XED helps a firm anticipate competitor pricing strategies. If a competitor lowers prices, the firm can prepare defensive marketing, match the price cut, or bundle goods to maintain customer loyalty.
- It also helps the firm understand the scope of its own pricing power. If the firm raises prices, a high XED indicates that customers will quickly switch to rivals.

However, XED is not the only valuable concept, and may not be the most valuable:
- Price Elasticity of Demand (PED) is arguably more fundamental. Even with close substitutes, a firm must know its own PED to calculate the direct impact of its own price changes on total revenue. If all firms match a price cut, the market-wide demand may be inelastic, leading to lower revenues for everyone (a price war).
- Income Elasticity of Demand (YED) remains vital for long-term planning. If consumer incomes are rising rapidly, the overall market size might expand, which could render short-term pricing battles less critical than long-term capacity expansion.

Evaluation / Conclusion:
While XED is uniquely powerful for strategic planning and forecasting competitor moves in highly competitive markets, it cannot be used in isolation. A firm must combine XED with PED to ensure that its defensive price changes do not inadvertently reduce total revenue, and use YED to align production with broader macroeconomic trends. Therefore, XED is highly valuable but must be integrated with PED and YED for optimal decision-making.

Part (a): [8 Marks]
- AO1 Knowledge and Understanding (3 marks): Max 3 marks for defining and giving formulas for PED and YED, identifying elastic/inelastic demand, and normal/luxury/inferior goods.
- AO2 Application and Analysis (5 marks): Max 5 marks for explaining how PED dictates pricing decisions to maximize revenue, and how YED guides production levels (expansion for normal/luxury, contraction for inferior) specifically in an economic recovery (rising incomes).

Part (b): [12 Marks]
- AO1 Knowledge and Understanding & AO2 Application and Analysis (8 marks):
- Max 4 marks for analyzing the value of XED in competitive markets with close substitutes (predicting competitor price cuts, assessing substitute threat).
- Max 4 marks for analyzing the limitations of relying solely on XED, and the comparative value of other elasticities (PED for revenue effects, YED for income shocks/growth).
- AO3 Evaluation (4 marks):
- Max 4 marks for a reasoned judgement on whether XED is the 'most' valuable. Candidates should recognize that whilst XED is essential for competitive dynamics, PED remains fundamental to actual revenue calculation, concluding that an integrated approach of using multiple elasticities is superior.

### Part (a) Solution

**Introduction:**
Macroeconomic objectives often conflict with one another. Two key objectives are achieving rapid economic growth (an increase in real GDP over time) and maintaining a stable current account balance (where exports and imports of goods, services, primary income, and secondary income are roughly equal, avoiding persistent deficits).

**The Conflict Mechanisms:**
1. **The Income Effect (Import Penetration):**
When an economy experiences rapid economic growth, national income and household disposable incomes rise. Since consumers have a marginal propensity to import (MPM), a portion of this additional income is spent on foreign goods and services. Consequently, import expenditure (M) increases. If export revenue (X) remains constant, this rise in imports worsens the current account balance, potentially leading to a larger deficit.

2. **The Inflation/Price Effect:**
Rapid economic growth, particularly if driven by aggregate demand (AD) shifting faster than long-run aggregate supply (LRAS), can cause demand-pull inflation. As the domestic price level rises relative to other countries, domestic exports become less price-competitive on global markets. Foreign buyers will reduce their purchases of these exports. At the same time, foreign imports become relatively cheaper and more attractive to domestic consumers. This dual effect of falling export revenues and rising import expenditures further deteriorates the current account.

3. **Diversion of Exports:**
With strong domestic demand during a boom, domestic firms may divert goods originally intended for export to the domestic market because selling locally is easier and more profitable. This reduces export volumes, worsening the current account balance.

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### Part (b) Solution

**Introduction:**
Governments use various policy options, including supply-side policies (designed to increase the productive capacity of the economy) and fiscal policies (using government spending and taxation to influence AD), to achieve macroeconomic objectives. Conflicts often arise, such as between growth and inflation or growth and the current account.

**Analysis of Supply-Side Policies in Resolving Conflicts:**
Supply-side policies aim to shift the LRAS curve to the right. These include market-based policies (e.g., deregulation, tax cuts, privatization) and interventionist policies (e.g., government spending on education, training, and infrastructure).
* **Resolving the Growth-Inflation Conflict:** By shifting LRAS to the right, supply-side policies allow the economy to grow without experiencing demand-pull inflationary pressures. Real GDP increases while the price level is kept low.
* **Resolving the Growth-Current Account Conflict:** Improved education and infrastructure increase productivity and reduce unit labor costs. This makes domestic exports more price-competitive and of higher quality globally, helping to boost exports (X) even as national income (and imports) grow, thus mitigating the current account deficit.

**Analysis of Fiscal Policies in Resolving Conflicts:**
Fiscal policy primarily manages aggregate demand.
* **Limitations in Conflict Resolution:** If the government uses expansionary fiscal policy to promote growth, it shifts AD to the right. While output increases, this typically causes inflation and worsens the current account. If it uses contractionary fiscal policy to control inflation, it slows down growth and increases unemployment. Thus, demand-side fiscal policy often exacerbates, rather than resolves, macroeconomic conflicts in the short run.
* **Supply-side Fiscal Policy:** However, fiscal policy can be targeted at the supply side. For example, government spending on capital infrastructure or tax credits for research and development (R&D) acts to increase LRAS.

**Evaluation:**
Whether supply-side policies are always more effective is highly debatable:
1. **Time Lags:** Supply-side policies have very long time lags. Education reforms or building transport networks can take years or even decades to bear fruit. In contrast, fiscal policy can be deployed more rapidly (e.g., emergency stimulus packages or tax adjustments) to address urgent cyclical problems.
2. **Inception in a Recession:** During a deep recession, the primary problem is a lack of aggregate demand (deflationary gap). Shifting LRAS to the right when there is already excess capacity does not solve unemployment or low growth. In this scenario, expansionary fiscal policy is far more effective.
3. **Government Budgetary Constraints:** Supply-side policies (especially interventionist ones) are highly expensive and can lead to massive government budget deficits, conflicting with fiscal stability objectives.
4. **Uncertainty of Outcomes:** Deregulation can lead to market failures, and tax cuts may not guarantee increased work effort or investment.

**Conclusion:**
Supply-side policies are not always more effective. While they are superior for resolving structural conflicts and achieving sustainable, non-inflationary long-term growth, they are slow and ineffective during short-run demand-deficient crises. Therefore, the most effective approach is a policy mix: using fiscal policy to stabilize aggregate demand in the short run while simultaneously implementing supply-side policies to expand productive capacity for the long run.

### Part (a) Marking Scheme (8 Marks)

* **Knowledge and Understanding of Economic Growth and Current Account Balance (Up to 3 marks):**
* **1 mark:** Clear definition of economic growth (e.g., percentage increase in real GDP).
* **1-2 marks:** Clear explanation of what constitutes a stable current account (avoidance of unsustainable deficits/surpluses, balance of trade in goods/services, primary and secondary income).

* **Analysis of the Conflict (Up to 4 marks):**
* **1-2 marks:** Explaining the income effect—rising real incomes lead to higher spending on imports (M), worsening the current account.
* **1-2 marks:** Explaining the inflation/price effect—high growth causes demand-pull inflation, making exports less competitive and imports more attractive.

* **Structure and Terminology (1 mark):**
* **1 mark:** Use of appropriate economic terms (e.g., marginal propensity to import, AD/AS framework, price competitiveness) or an accurate diagram showing AD shifting and causing inflation.

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### Part (b) Marking Scheme (12 Marks)

**AO1 Knowledge and Understanding & AO2 Analysis (Max 8 marks):**
* **Level 3 (6–8 marks):** Candidates demonstrate a clear understanding of both supply-side and fiscal policies and systematically analyze how they attempt to resolve conflicts (such as growth vs. inflation or growth vs. current account). Analysis is supported by accurate economic theory and/or well-drawn AD/AS diagrams.
* **Level 2 (3–5 marks):** Candidates explain both policies but with limited analysis of how they resolve conflicts, or provide a detailed analysis of only one policy type.
* **Level 1 (1–2 marks):** Candidates show basic knowledge, defining the policies but offering little to no analysis of macroeconomic conflicts.

**AO3 Evaluation (Max 4 marks):**
* **Level 3 (3–4 marks):** A balanced and reasoned judgment is provided. Candidates directly address whether supply-side policies are always more effective, highlighting critical limitations (e.g., time lags, high cost, ineffectiveness during demand-deficient recessions) and explaining why a policy mix or fiscal policy is superior in certain economic climates.
* **Level 2 (2 marks):** Explains some limitations of supply-side or strengths of fiscal policy but lacks a fully developed, integrated conclusion.
* **Level 1 (1 mark):** Provides a simple, unsupported evaluative claim.