IB DP · Thinka-original Practice Paper

2024 IB DP Economics Practice Paper with Answers

Thinka Nov 2024 HL (TZ1) IB Diploma Programme-Style Mock — Economics

25 marks75 mins2024
AnalysisSample paper
An original Thinka practice paper modelled on the structure and difficulty of the Nov 2024 HL (TZ1) IB Diploma Programme Economics paper. Not affiliated with or reproduced from IB.

Section Extended Response Questions

Answer one question from a choice of three. Each question consists of a 10-mark explanation part (a) and a 15-mark evaluation/discussion part (b). Fully labelled diagrams and real-world examples must be used where appropriate.
3 Question · 40 marks
Question 1 · Part (a) Explanation
10 marks
Explain, using an exchange rate diagram and a real-world example, how a central bank can intervene in the foreign exchange market to maintain a fixed exchange rate when there is downward pressure on the value of its currency.
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Worked solution

### Theoretical Explanation

A **fixed exchange rate** is a regime where a country's currency value is pegged to another currency or a basket of currencies by the central bank. When there is downward pressure on the currency (e.g., due to a trade deficit, speculative capital outflows, or high domestic inflation relative to trading partners), the market exchange rate threatens to fall below the pegged level. This creates a surplus of the currency at the fixed rate.

To maintain the peg, the central bank has two primary tools:

1. **Buying Domestic Currency using Foreign Exchange Reserves:**
The central bank sells its reserves of foreign currencies (such as US Dollars or Euros) and buys its own currency in the foreign exchange market. This increases the market demand for the domestic currency, shifting the demand curve to the right, which counteracts the downward pressure and keeps the exchange rate at the pegged value.

2. **Increasing Domestic Interest Rates:**
The central bank can implement tight monetary policy by raising domestic interest rates. Higher interest rates attract financial investment ("hot money") from abroad as foreign investors seek higher returns. To invest, they must buy the domestic currency, which increases demand for the domestic currency and reduces its supply (as domestic residents keep their money at home), stabilizing the exchange rate.

### Diagrammatic Representation

In a foreign exchange diagram:
- The vertical axis represents the exchange rate in terms of foreign currency per unit of domestic currency (
\(P\) of domestic currency in foreign currency).
- The horizontal axis represents the quantity of domestic currency.
- Let the initial equilibrium be at the pegged rate \(ER_{peg}\), where market demand \(D_1\) meets supply \(S_1\).
- If downward pressure occurs (e.g., due to capital flight, shifting demand from \(D_1\) to \(D_2\)), a surplus of the currency is created at \(ER_{peg}\).
- The central bank's intervention to buy domestic currency shifts demand back from \(D_2\) to \(D_1\) (or a new demand curve that intersects \(S_1\) at \(ER_{peg}\)), restoring equilibrium at the pegged exchange rate.

### Real-World Example

- **Hong Kong Monetary Authority (HKMA):** The Hong Kong Dollar (HKD) is linked to the US Dollar (USD) at a fixed range of 7.75 to 7.85 HKD per USD. When there is downward pressure on the HKD (pushing it toward the weak end of 7.85), the HKMA intervenes by buying HKD and selling USD from its massive foreign exchange reserves, while simultaneously allowing local interbank interest rates (HIBOR) to rise, thereby defending the peg successfully.

Marking scheme

**Markband Descriptor (Out of 10 Marks)**

- **Level 4 (9–10 marks):** The response shows an in-depth understanding of the demands of the question. A relevant economic diagram is drawn and fully explained. Relevant economic terms (fixed exchange rate, central bank intervention, foreign exchange reserves, interest rates) are defined and used accurately. A highly relevant real-world example (e.g., HKMA defending the HKD) is integrated and explained clearly to support the theoretical explanation.

- **Level 3 (7–8 marks):** The response shows a good understanding of how a central bank defends a fixed exchange rate. An appropriate diagram is drawn, though there may be minor omissions in labeling or explanation. Key concepts are explained, including buying currency and changing interest rates, but the explanation may lack some depth. A relevant real-world example is included but not fully integrated.

- **Level 2 (4–6 marks):** The response shows some understanding of the mechanisms used. The diagram is partially complete or contains errors. The distinction between buying reserves and raising interest rates is vague. Real-world examples are either missing, inaccurate, or merely mentioned without development.

- **Level 1 (1–3 marks):** The response is very limited. Important concepts are missing, incorrect, or heavily confused. No relevant diagram or real-world example is provided.
Question 2 · essay
15 marks
Discuss the view that the economic benefits of joining a monetary union outweigh the potential economic costs for its member countries.
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Worked solution

Detailed Solution:

1. Definition and Context:
A monetary union is a high level of economic integration where member countries share a single common currency and a single central bank responsible for a common monetary policy (for example, the European Central Bank in the Eurozone).

2. Arguments for the View (Economic Benefits):
• Elimination of Transaction Costs: Commencing trade or travel between member states no longer requires currency exchange, saving businesses and consumers significant transaction fees.
• Price Transparency: A single currency allows consumers and firms to easily compare prices across borders. This increases competition, leading to lower prices and greater economic efficiency.
• Elimination of Exchange Rate Risk: Fluctuations in exchange rates are eradicated within the union. This stability fosters long-term business confidence, boosting intra-union trade and foreign direct investment (FDI).
• Inflation and Interest Rate Stability: Smaller or historically high-inflation nations benefit from the credibility of a strong, independent common central bank, which can lead to permanently lower inflation and lower interest rates, stimulating long-term investment (shifting Aggregate Demand (AD) and Long-Run Aggregate Supply (LRAS) to the right).

3. Diagrams:
An AD/AS diagram can be used to show how the elimination of transaction costs and exchange rate risks boosts investment (I) and net exports (X-M), shifting AD to the right (from AD_1 to AD_2) and increasing real GDP. Another diagram could show long-run growth as LRAS shifts outward due to increased investment.

4. Arguments against the View (Economic Costs):
• Loss of Independent Monetary Policy: Member countries yield monetary sovereignty to the common central bank. If one nation experiences a deep recession while others are booming, the central bank cannot lower interest rates specifically for the struggling nation.
• Loss of Exchange Rate Flexibility: Countries can no longer devalue their currency to regain international competitiveness. Instead, adjustment must occur through painful 'internal devaluation' (cutting nominal wages and spending), which can cause prolonged unemployment.
• Fiscal Policy Constraints: To support a single currency, member nations must adhere to strict fiscal rules (such as deficit and debt limits), restricting their ability to use expansionary fiscal policy during recessions.
• Asymmetric Shocks: If an economic shock affects only one member state, the lack of tailored national policy responses can exacerbate structural unemployment and low growth.

5. Real-World Examples:
• The Eurozone: The benefits of integration have been enjoyed by core countries like Germany through export expansion. However, during the sovereign debt crisis (post-2009), peripheral nations like Greece and Spain suffered severely because they could not devalue the Euro or lower domestic interest rates to recover, leading to mass unemployment.

6. Evaluation and Synthesis:
The balance of benefits and costs depends on whether the union meets the criteria of an Optimum Currency Area (OCA):
• Labor mobility: If workers can move freely from depressed regions to booming regions, the cost of losing independent policy is minimized.
• Wage and price flexibility: Flexible wages allow markets to adjust without currency devaluation.
• Fiscal transfers: A federal budget or common fiscal mechanism can redistribute funds to regions facing asymmetric shocks.

In conclusion, for countries with highly synchronized business cycles, flexible labor markets, and fiscal integration, the benefits of a monetary union are highly likely to outweigh the costs. However, for heterogeneous economies lacking these mechanisms, the loss of monetary autonomy can lead to severe economic stagnation.

Marking scheme

Marking Scheme (Max 15 marks):

• 13–15 marks: The candidate demonstrates excellent understanding of monetary unions. Relevant diagrams (AD/AS) are fully integrated, correctly drawn, and explained. There is a well-structured, balanced discussion of both the benefits (transaction costs, transparency, trade) and costs (loss of monetary/exchange rate autonomy). Real-world examples (such as the Eurozone crisis) are used effectively. Evaluation is critical, synthesized, and draws upon economic theories like the Optimum Currency Area (OCA).

• 10–12 marks: The candidate provides a good explanation of the benefits and costs of joining a monetary union. Relevant diagrams are included but may not be fully integrated into the text. Examples are used but may lack detail. Discussion is balanced, but the final evaluation is less developed or lacks synthesis.

• 7–9 marks: The candidate explains some benefits and costs but the discussion is unbalanced or lacks depth. Diagrams may be missing or contain errors. Examples are weak or absent. Evaluation is superficial or merely a summary.

• 4–6 marks: The candidate shows limited understanding of monetary unions. Terminology is weak, and there is little to no evaluation.

• 1–3 marks: The response is largely irrelevant, with major misconceptions about economic integration.
Question 3 · essay
15 marks
Discuss the view that the economic benefits of joining a monetary union outweigh the potential economic costs for its member countries.
Show answer & marking scheme

Worked solution

Detailed Solution:

1. Definition and Context:
A monetary union is a high level of economic integration where member countries share a single common currency and a single central bank responsible for a common monetary policy (for example, the European Central Bank in the Eurozone).

2. Arguments for the View (Economic Benefits):
• Elimination of Transaction Costs: Commencing trade or travel between member states no longer requires currency exchange, saving businesses and consumers significant transaction fees.
• Price Transparency: A single currency allows consumers and firms to easily compare prices across borders. This increases competition, leading to lower prices and greater economic efficiency.
• Elimination of Exchange Rate Risk: Fluctuations in exchange rates are eradicated within the union. This stability fosters long-term business confidence, boosting intra-union trade and foreign direct investment (FDI).
• Inflation and Interest Rate Stability: Smaller or historically high-inflation nations benefit from the credibility of a strong, independent common central bank, which can lead to permanently lower inflation and lower interest rates, stimulating long-term investment (shifting Aggregate Demand (AD) and Long-Run Aggregate Supply (LRAS) to the right).

3. Diagrams:
An AD/AS diagram can be used to show how the elimination of transaction costs and exchange rate risks boosts investment (I) and net exports (X-M), shifting AD to the right (from AD_1 to AD_2) and increasing real GDP. Another diagram could show long-run growth as LRAS shifts outward due to increased investment.

4. Arguments against the View (Economic Costs):
• Loss of Independent Monetary Policy: Member countries yield monetary sovereignty to the common central bank. If one nation experiences a deep recession while others are booming, the central bank cannot lower interest rates specifically for the struggling nation.
• Loss of Exchange Rate Flexibility: Countries can no longer devalue their currency to regain international competitiveness. Instead, adjustment must occur through painful 'internal devaluation' (cutting nominal wages and spending), which can cause prolonged unemployment.
• Fiscal Policy Constraints: To support a single currency, member nations must adhere to strict fiscal rules (such as deficit and debt limits), restricting their ability to use expansionary fiscal policy during recessions.
• Asymmetric Shocks: If an economic shock affects only one member state, the lack of tailored national policy responses can exacerbate structural unemployment and low growth.

5. Real-World Examples:
• The Eurozone: The benefits of integration have been enjoyed by core countries like Germany through export expansion. However, during the sovereign debt crisis (post-2009), peripheral nations like Greece and Spain suffered severely because they could not devalue the Euro or lower domestic interest rates to recover, leading to mass unemployment.

6. Evaluation and Synthesis:
The balance of benefits and costs depends on whether the union meets the criteria of an Optimum Currency Area (OCA):
• Labor mobility: If workers can move freely from depressed regions to booming regions, the cost of losing independent policy is minimized.
• Wage and price flexibility: Flexible wages allow markets to adjust without currency devaluation.
• Fiscal transfers: A federal budget or common fiscal mechanism can redistribute funds to regions facing asymmetric shocks.

In conclusion, for countries with highly synchronized business cycles, flexible labor markets, and fiscal integration, the benefits of a monetary union are highly likely to outweigh the costs. However, for heterogeneous economies lacking these mechanisms, the loss of monetary autonomy can lead to severe economic stagnation.

Marking scheme

Marking Scheme (Max 15 marks):

• 13–15 marks: The candidate demonstrates excellent understanding of monetary unions. Relevant diagrams (AD/AS) are fully integrated, correctly drawn, and explained. There is a well-structured, balanced discussion of both the benefits (transaction costs, transparency, trade) and costs (loss of monetary/exchange rate autonomy). Real-world examples (such as the Eurozone crisis) are used effectively. Evaluation is critical, synthesized, and draws upon economic theories like the Optimum Currency Area (OCA).

• 10–12 marks: The candidate provides a good explanation of the benefits and costs of joining a monetary union. Relevant diagrams are included but may not be fully integrated into the text. Examples are used but may lack detail. Discussion is balanced, but the final evaluation is less developed or lacks synthesis.

• 7–9 marks: The candidate explains some benefits and costs but the discussion is unbalanced or lacks depth. Diagrams may be missing or contain errors. Examples are weak or absent. Evaluation is superficial or merely a summary.

• 4–6 marks: The candidate shows limited understanding of monetary unions. Terminology is weak, and there is little to no evaluation.

• 1–3 marks: The response is largely irrelevant, with major misconceptions about economic integration.

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