IB DP · Thinka-original Practice Paper

2024 IB DP Economics Practice Paper with Answers

Thinka May 2024 SL (TZ1) IB Diploma Programme-Style Mock — Economics

65 marks180 mins2024

An original Thinka practice paper modelled on the structure and difficulty of the May 2024 SL (TZ1) IB Diploma Programme Economics paper. Not affiliated with or reproduced from IB.

Paper 1 (Standard Level)

Answer one question. Use fully labelled diagrams where appropriate.

2 Question · 25 marks

Question 1 · essay

10 marks

Explain how a central bank might use monetary policy and direct market intervention to prevent its national currency from depreciating.

Show answer & marking scheme

Worked solution

Introduction & Definitions:

Depreciation: A decrease in the value of a currency relative to other currencies, typically in a floating or managed exchange rate system.
Monetary Policy: The use of interest rates and money supply control by a central bank to influence economic activity and exchange rates.
Direct Intervention: The buying or selling of foreign currency reserves by the central bank in the foreign exchange (forex) market to influence the value of the domestic currency.

Mechanism 1: Monetary Policy (Interest Rate Increases)

To prevent its currency from depreciating, the central bank can implement contractionary monetary policy by raising domestic interest rates. Higher interest rates offer foreign and domestic investors a higher rate of return on savings deposits and financial assets (e.g., government bonds) relative to other countries.

This attracts short-term financial capital inflows, commonly referred to as 'hot money'. To purchase these high-yielding domestic financial assets, foreign investors must first convert their foreign currencies into the domestic currency. This increases the demand for the domestic currency in the foreign exchange market, shifting the demand curve for the currency to the right (from $D_1$ to $D_2$) and preventing its depreciation.

Mechanism 2: Direct Intervention in the Forex Market

Alternatively, the central bank can directly intervene by using its stock of foreign exchange reserves. If the currency is facing downward pressure, the central bank will sell its foreign currencies (e.g., USD, EUR) and purchase its own domestic currency in the open market.

This action directly increases the market demand for the domestic currency, shifting the demand curve to the right (from $D_1$ to $D_2$). By absorbing the excess supply of its currency, the central bank successfully prevents or reverses the depreciation.

Diagrammatic Representation:

A diagram of the foreign exchange market should be drawn, showing:

The vertical axis labeled 'Exchange rate' (price of domestic currency in terms of a foreign currency, e.g., USD/Domestic Currency).
The horizontal axis labeled 'Quantity of Domestic Currency'.
An initial demand curve ($D_1$) and supply curve ($S_1$) intersecting at equilibrium exchange rate $ER_1$.
A rightward shift of the demand curve to $D_2$ representing the impact of either higher interest rates (hot money inflows) or direct central bank purchases.
A new equilibrium exchange rate at $ER_2$, showing an appreciation or stabilization of the currency value back to its target level.

Marking scheme

Specific Marking Guidelines (10 Marks):

Level 1 (1–3 marks): The response shows a limited understanding of how central banks influence exchange rates. Terminology is weak, and there are major errors in explaining interest rates or foreign currency reserves. No diagram is present, or the diagram is highly inaccurate.
Level 2 (4–6 marks): The response shows some understanding of at least one of the two methods (monetary policy or direct intervention). Economic terminology is used, but there are gaps in explaining the mechanisms (e.g., failing to connect interest rates to 'hot money' inflows). A diagram is included but may be poorly labeled or not integrated into the explanation.
Level 3 (7–9 marks): The response clearly explains both mechanisms (monetary policy via interest rates and direct intervention via foreign exchange reserves). Economic terminology is used accurately (e.g., hot money, foreign exchange reserves, demand shifts). A fully labeled and correct foreign exchange market diagram is included and integrated into the explanation.
Level 4 (10 marks): The response meets all Level 3 criteria and demonstrates an excellent depth of explanation. The distinction between monetary policy (indirect effect via financial markets) and direct intervention (direct buying of currency using reserves) is clearly articulated and logical throughout.

Question 2 · Part (b) Evaluation Essay

15 marks

Discuss the view that expansionary monetary policy is the most effective policy to stimulate an economy experiencing a recessionary gap.

Show answer & marking scheme

Worked solution

### Introduction
- **Definitions**: Define key terms such as *expansionary monetary policy* (actions by the central bank to decrease interest rates or increase the money supply to boost economic activity) and a *recessionary gap* (a situation where real GDP is below potential full-employment GDP).
- **Context**: State the primary goal of the policy, which is to shift Aggregate Demand (AD) to the right to achieve full employment output (
$Y_p$).

### Diagram
- An AD/AS diagram (using either the Keynesian or Monetarist/New Classical framework) showing:
- The initial equilibrium (
$Y_1 < Y_p$) indicating a recessionary gap.
- An increase in Aggregate Demand from $AD_1$ to $AD_2$.
- The movement of real output back toward potential output $Y_p$, accompanied by a rise in the price level from $P_1$ to $P_2$.

### Explanation of the Policy Transmission Mechanism
- The central bank reduces the policy interest rate (e.g., the federal funds rate or base rate).
- Commercial banks lower their lending rates.
- **Consumption (C)** increases as the cost of borrowing for durable goods falls and the incentive to save decreases.
- **Investment (I)** increases as the cost of borrowing for capital goods falls, making more investment projects profitable.
- **Net Exports (X-M)** may increase because lower interest rates can lead to financial capital outflows, causing the exchange rate to depreciate, making exports cheaper and imports more expensive.
- The rise in $C$, $I$, and $X-M$ shifts the $AD$ curve to the right: $AD = C + I + G + (X-M)$.

### Evaluation and Discussion (Arguments for and against)

**Arguments supporting monetary policy as the 'most effective' policy:**
- **Speed of implementation**: Unlike fiscal policy, which requires legislative approval and can suffer from long political delays, central banks can adjust interest rates quickly (often monthly).
- **Independence**: Central banks are usually politically independent, meaning decisions are made based on economic data rather than electoral cycles.
- **Fine-tuning**: Interest rates can be adjusted incrementally by small fractions of a percentage point, allowing for precise policy adjustments.

**Arguments against / limitations of monetary policy:**
- **Ineffectiveness in deep recessions (Liquidity Trap)**: If interest rates are already near zero, the central bank cannot easily lower them further (though unconventional measures like Quantitative Easing can be used). Under extremely low confidence, consumers and firms will not borrow regardless of how low rates are.
- **Time lags**: It can take 12 to 18 months for interest rate changes to fully transmit through the financial system to influence real economic activity.
- **Asymmetric impact**: While monetary policy is highly effective at slowing down an overheating economy (by raising interest rates), it is often likened to "pushing on a string" when trying to stimulate a depressed economy because it relies on the willingness of banks to lend and consumers to borrow.

**Comparison with alternative policies:**
- **Fiscal Policy**: Direct government spending (G) is a direct injection into the circular flow of income and does not rely on consumer confidence to initiate spending. However, it leads to budget deficits and has long legislative lags.
- **Supply-side policies**: Crucial for long-term growth but ineffective for addressing a short-run cyclical recessionary gap.

### Conclusion / Synthesis
- Summarize that while expansionary monetary policy is highly flexible and free from political bias, it is rarely sufficient on its own during a deep or prolonged recession due to confidence constraints. It is most effective when coordinated with expansionary fiscal policy to directly stimulate aggregate demand.

Marking scheme

### Markbands out of 15 marks:

* **0**: The work does not reach a standard described by the descriptors below.
* **1–3 marks**: Minimal understanding. Identifies some terms like monetary policy or recessionary gap but with significant errors. No diagram or a highly inaccurate one. No evaluation.
* **4–6 marks**: A limited response. Explains some aspects of monetary policy (e.g., lowering interest rates) but the link to aggregate demand is weak. Diagrams are present but incomplete, poorly labelled, or not integrated into the text. Evaluation is absent or merely a list of points.
* **7–9 marks**: A satisfactory response. Accurately defines key terms and uses an AD/AS diagram to illustrate the shift in aggregate demand. Explains the transmission mechanism (
$Interest\ rates \rightarrow C, I \rightarrow AD$). Some attempt at evaluation is made (e.g., mentioning time lags or confidence), but it lacks depth, balance, or a clear synthesis.
* **10–12 marks**: A strong response. Clear, structured, and precise explanation of expansionary monetary policy using a fully-labeled AD/AS diagram. Well-developed evaluation that compares monetary policy's advantages (independence, speed) against its limitations (liquidity trap, confidence, time lags). Explicitly addresses whether it is the "most effective" policy compared to alternatives like fiscal policy.
* **13–15 marks**: An outstanding response. Meets all the criteria for 10–12 marks but demonstrates a deeper economic synthesis. The evaluation is nuanced, recognizing that policy effectiveness is context-dependent (e.g., mild recession vs. deep financial crisis). The conclusion is well-supported, cohesive, and flows logically from the arguments presented.

Paper 2 (Standard Level)

Answer one question. Use fully labelled diagrams and references to the text/data where appropriate.

10 Question · 41 marks

Question 1 · Definition

2 marks

Define the term 'depreciation' of a currency.

Show answer & marking scheme

Worked solution

Depreciation is the decrease in the value of a currency in terms of another currency. This occurs within a floating exchange rate system, where the exchange rate is determined entirely by market forces of demand and supply for the currency on the foreign exchange market.

Marking scheme

Award [1] for recognizing that depreciation represents a fall in the value of a currency. Award [2] for a complete definition that clearly states this fall occurs in a floating exchange rate system or is determined by market forces of demand and supply.

Question 2 · Definition

2 marks

Define the term 'microfinance' as a strategy for economic development.

Show answer & marking scheme

Worked solution

Microfinance is an economic development strategy involving the provision of financial services (such as microcredit, savings, and insurance) to poor or low-income individuals and entrepreneurs who are excluded from traditional banking systems, enabling them to generate income and build assets.

Marking scheme

Award [1] for a basic definition that mentions small loans or financial services provided to low-income individuals. Award [2] for a complete definition that specifies the provision of financial services to those excluded from traditional banking to help them generate income or promote self-sufficiency.

Question 3 · Calculations

2 marks

Using the exchange rate data below, calculate the percentage change in the value of the Euro (EUR) against the US Dollar (USD) when the exchange rate moves from:
- Initial rate: $ 1 \text{ USD} = 0.80 \text{ EUR} $
- New rate: $ 1 \text{ USD} = 1.00 \text{ EUR} $

Show answer & marking scheme

Worked solution

To calculate the percentage change in the value of the Euro (EUR) relative to the US Dollar (USD), we must first express the exchange rates in terms of the USD value of 1 EUR.

1. Calculate the initial value of $ 1 \text{ EUR} $ in USD:
$ 1 \text{ EUR} = \frac{1}{0.80} = 1.25 \text{ USD} $

2. Calculate the new value of $ 1 \text{ EUR} $ in USD:
$ 1 \text{ EUR} = \frac{1}{1.00} = 1.00 \text{ USD} $

3. Calculate the percentage change in the value of the Euro:
$ \text{Percentage change} = \frac{\text{New Value} - \text{Initial Value}}{\text{Initial Value}} \times 100 $
$ \text{Percentage change} = \frac{1.00 - 1.25}{1.25} \times 100 = -20\% $

Marking scheme

- 1 mark for correct working showing the calculation of Euro values in USD: $ 1 \text{ EUR} = 1.25 \text{ USD} $ and $ 1 \text{ EUR} = 1.00 \text{ USD} $ (or for setting up the correct equation for percentage change).
- 1 mark for the correct final answer of $ -20\% $ or "a depreciation of $ 20\% $". (Do not award the second mark if the student only writes "$ 20\% $" without indicating it is a negative change or depreciation).

Question 4 · Calculations

2 marks

The data below shows the Consumer Price Index (CPI) for Country Y over two years.
- Year 1 CPI: 112.5
- Year 2 CPI: 117.0

Calculate the rate of inflation in Country Y for Year 2.

Show answer & marking scheme

Worked solution

To calculate the rate of inflation, we find the percentage change in the Consumer Price Index (CPI) from Year 1 to Year 2:

$ \text{Inflation Rate} = \frac{\text{CPI in Year 2} - \text{CPI in Year 1}}{\text{CPI in Year 1}} \times 100 $

$ \text{Inflation Rate} = \frac{117.0 - 112.5}{112.5} \times 100 $

$ \text{Inflation Rate} = \frac{4.5}{112.5} \times 100 = 4\% $

Marking scheme

- 1 mark for showing correct working and substitution of figures into the percentage change formula: $ \frac{117.0 - 112.5}{112.5} \times 100 $ (or equivalent).
- 1 mark for the correct answer of $ 4\% $ (or $ 4 $).

Question 5 · Calculations

2 marks

The demand and supply functions for agricultural fertilizer are given by:
$ Q_d = 120 - 4P $
$ Q_s = -30 + 6P $

where $ Q $ is quantity in thousands of bags and $ P $ is the price in dollars ($) per bag.

The government decides to impose an indirect tax of $3 per bag on the producers. Calculate the new equilibrium price paid by consumers.

Show answer & marking scheme

Worked solution

1. Set up the new supply equation that accounts for the $3 tax. Because producers must pay the tax, they require a price that is $3 higher to supply any given quantity. Thus, we substitute $ (P - 3) $ into the supply function:
$ Q_{s,\text{new}} = -30 + 6(P - 3) $
$ Q_{s,\text{new}} = -30 + 6P - 18 $
$ Q_{s,\text{new}} = -48 + 6P $

2. Equate the demand function to the new supply function to find the new market equilibrium price paid by consumers:
$ 120 - 4P = -48 + 6P $
$ 120 + 48 = 6P + 4P $
$ 168 = 10P $
$ P = 16.8 $

Therefore, the new price paid by consumers is $16.80.

Marking scheme

- 1 mark for correctly determining the new supply function: $ Q_s = -48 + 6P $ (or setting up the equation $ 120 - 4P = -30 + 6(P - 3) $).
- 1 mark for the correct equilibrium consumer price: $16.80 (accept $ 16.8 $ or $ 16.80 $).

Question 6 · Short Diagrams & Explanations

4 marks

Using an exchange rate diagram, explain how an increase in interest rates in Australia might affect the exchange rate of the Australian Dollar (AUD).

Show answer & marking scheme

Worked solution

Diagram: The diagram should have Exchange Rate (e.g., USD per AUD) on the vertical axis and Quantity of AUD on the horizontal axis. It must show a downward-sloping demand curve (D1) and an upward-sloping supply curve (S1) intersecting at an initial exchange rate (ER1). A shift of the demand curve to the right to D2 should be shown, resulting in a higher equilibrium exchange rate (ER2). Explanation: 1. Higher interest rates in Australia make Australian financial assets more attractive to international investors looking for higher returns. 2. To buy these assets, foreign investors must purchase Australian Dollars, which increases the demand for the currency. 3. This rightward shift in the demand curve from D1 to D2 leads to an appreciation of the Australian Dollar from ER1 to ER2.

Marking scheme

For drawing a fully labelled exchange rate diagram showing: Correctly labelled axes (Exchange rate in foreign currency per AUD, and Quantity of AUD) and curves (D and S of AUD) [1 mark]; A rightward shift of the demand curve and an increase in the exchange rate [1 mark]. For explaining that: Higher interest rates attract foreign financial investment (hot money flows) seeking higher yields [1 mark]; This investment increases the demand for the currency, causing it to appreciate [1 mark].

Question 7 · Short Diagrams & Explanations

4 marks

Using a demand and supply diagram, explain how the imposition of a price ceiling (maximum price) below the equilibrium price on rental housing creates a shortage.

Show answer & marking scheme

Worked solution

Diagram: The diagram should show the market for rental housing with Rent/Price on the vertical axis and Quantity of Housing on the horizontal axis. It must include a downward-sloping demand curve (D) and an upward-sloping supply curve (S) intersecting at equilibrium (Pe, Qe). A horizontal price ceiling line (Pc) must be drawn below Pe. At Pc, the quantity demanded (Qd) should be greater than the quantity supplied (Qs). Explanation: 1. A price ceiling is a maximum legal price set below the market equilibrium to keep rental housing affordable. 2. Because the price is restricted below equilibrium, consumers demand more units (Qd increases), while landlords are less willing to supply units at this lower price (Qs decreases). 3. Since the quantity demanded exceeds the quantity supplied (Qd > Qs), a shortage equal to the distance between Qd and Qs is created.

Marking scheme

For drawing a fully labelled market diagram showing: Correctly labelled axes (Price/Rent and Quantity) and curves (D and S) with the initial equilibrium [1 mark]; A price ceiling line (Pc) below the equilibrium price showing Qd > Qs [1 mark]. For explaining that: Setting a price below equilibrium increases quantity demanded while decreasing the incentive for suppliers to provide housing [1 mark]; Because the legal price prevents the market from clearing, a persistent shortage (excess demand) is created [1 mark].

Question 8 · Short Diagrams & Explanations

4 marks

Using an AD/AS diagram, explain the short-run impact of an increase in the world price of oil on an oil-importing nation's price level and real GDP.

Show answer & marking scheme

Worked solution

Diagram: The diagram should have Price Level on the vertical axis and Real GDP on the horizontal axis. It must show a downward-sloping Aggregate Demand (AD) curve and an upward-sloping Short-Run Aggregate Supply (SRAS1) curve intersecting at an initial equilibrium (PL1, Y1). A leftward shift of the SRAS curve to SRAS2 must be shown, resulting in a higher price level (PL2) and lower real GDP (Y2). Explanation: 1. Oil is a major cost component for transportation, energy, and manufacturing. An increase in its price raises production costs across the economy. 2. This increase in costs shifts the short-run aggregate supply curve to the left (from SRAS1 to SRAS2). 3. As a result, the price level rises from PL1 to PL2, representing cost-push inflation, and real GDP falls from Y1 to Y2, representing a contraction in economic activity.

Marking scheme

For drawing a fully labelled AD/AS diagram showing: Correctly labelled axes (Price Level and Real GDP) and curves (AD and SRAS) with initial equilibrium [1 mark]; A leftward shift of the SRAS curve showing a higher price level and a lower level of real GDP [1 mark]. For explaining that: Higher oil prices increase the costs of production for firms, shifting the SRAS curve to the left [1 mark]; This shift results in cost-push inflation (higher price level) and a contraction in real output (lower real GDP) [1 mark].

Question 9 · Short Diagrams & Explanations

4 marks

Using an AD/AS diagram, explain how a central bank can use expansionary monetary policy to close a deflationary (recessionary) gap.

Show answer & marking scheme

Worked solution

Diagram: The diagram should have Price Level on the vertical axis and Real GDP on the horizontal axis. It must show a vertical Long-Run Aggregate Supply (LRAS) curve at potential output (Yp), an upward-sloping Short-Run Aggregate Supply (SRAS) curve, and an Aggregate Demand (AD1) curve intersecting SRAS at an output level below potential (Y1 < Yp), representing the deflationary gap. A rightward shift of the AD curve to AD2 must be shown, intersecting SRAS at the full-employment level of output (Yp). Explanation: 1. To close a deflationary gap, the central bank implements expansionary monetary policy by lowering interest rates. 2. Lower interest rates reduce the cost of borrowing for households and firms, which stimulates consumption (C) and investment (I). 3. This increase in spending causes the Aggregate Demand curve to shift from AD1 to AD2, increasing real output back to potential GDP (Yp) and closing the deflationary gap.

Marking scheme

For drawing a fully labelled AD/AS diagram showing: Correctly labelled axes, LRAS representing potential output (Yp), and an initial equilibrium showing a deflationary gap where Y1 < Yp [1 mark]; A rightward shift of the AD curve to close the gap at Yp [1 mark]. For explaining that: The central bank lowers interest rates to reduce the cost of borrowing, which increases consumption and business investment [1 mark]; This increases total aggregate demand, shifting the AD curve to the right, which raises real GDP to potential output and closes the gap [1 mark].

Question 10 · Extended Policy Evaluation Essay

15 marks

**Text A: Economic Reforms in the Republic of Vanda**

The Republic of Vanda, a low-income nation heavily dependent on primary agricultural exports, has historically pursued an import-substitution strategy to develop its infant manufacturing sector. High tariffs were placed on imported consumer goods to encourage domestic manufacturing. However, this policy has resulted in inefficient domestic monopolies, high prices for consumers, a lack of competitiveness in global markets, and critically low foreign exchange reserves. To address these structural issues, the government of Vanda has proposed a transition towards an export-led growth strategy. This new policy package includes reducing import tariffs on raw industrial inputs, establishing Special Economic Zones (SEZs) with tax incentives to attract Foreign Direct Investment (FDI), and providing direct subsidies to domestic firms targeting international markets.

**Question:**

Using the text provided and your knowledge of economics, evaluate the economic consequences for the Republic of Vanda of shifting its development strategy from import substitution to export-led growth.

Show answer & marking scheme

Worked solution

### Model Essay Outline & Content

**Definitions & Background:**
- **Import Substitution Industrialization (ISI):** A protectionist strategy designed to replace imports with domestic production to foster domestic infant industries and reduce external dependency.
- **Export-Led Growth:** An outward-oriented strategy aiming to speed up the development process by focusing on the production of exports, utilizing cheap labor, specialized resources, and foreign direct investment.

**Diagrammatic Analysis:**
- An AD/AS diagram is highly appropriate.
- Label axes: Y-axis as Real GDP / Price Level, X-axis as Real Output ($Y$).
- Shift $AD_1 \to AD_2$ showing increase in export revenues ($X-M$) and Investment ($I$).
- Shift $LRAS_1 \to LRAS_2$ or $Y_{fe1} \to Y_{fe2}$ showing economic growth from technological spillover and increased productive capacity due to FDI.

**Arguments for the Transition to Export-Led Growth (using Text A):**
- **Efficiency Gains:** Removing protective tariffs forces domestic firms to compete globally, ending domestic monopolies and lowering consumer prices.
- **FDI and SEZs:** Special Economic Zones attract multinational corporations, providing Vanda with modern manufacturing techniques, skills transfer, and infrastructure improvements.
- **Foreign Exchange:** Exporting addresses Vanda's "critically low foreign exchange reserves," helping stabilize the currency and pay for capital imports.

**Arguments against / Limitations of the Transition:**
- **Fiscal Strain:** Direct subsidies and tax incentives reduce tax revenue, which could have been spent on public goods (e.g., primary education and healthcare) vital for human development.
- **External Shock Vulnerability:** Shifting to export-led growth makes Vanda highly susceptible to global trade wars, tariff changes, and global recessions.
- **Inequality and MNC Power:** Wealth generated in SEZs may stay concentrated in foreign hands (repatriated profits) or amongst urban elites, widening the rural-urban divide.

**Synthesis & Policy Recommendations:**
- The transition is necessary given the failure of Vanda's import-substitution model, but its success hinges on transitional support (retraining agriculturally displaced workers) and using tax revenues strategically over time to build domestic physical and social infrastructure.

Marking scheme

### IB Diploma Programme 15-Mark Essay Rubric

* **Level 1 (1–3 marks):** Little or no economic understanding shown. Terms are poorly defined, or the answer is purely descriptive with no diagrams or application to the text.
* **Level 2 (4–6 marks):** Demonstration of basic economic knowledge. Definitions are partially correct. Relevant concepts are mentioned, but diagrams are missing or drawn incorrectly. Application to the text is weak, and there is no evaluation.
* **Level 3 (7–9 marks):** Good understanding of import substitution and export-led growth. A relevant diagram (e.g., AD/AS showing expansion of AD and LRAS) is drawn and explained correctly. There is clear application to the text context (Vanda's agricultural dependence, tariffs, FDI, SEZs). Evaluation is present but may lack depth or balance.
* **Level 4 (10–12 marks):** Clear, accurate, and detailed economic analysis of both policies. The diagram is well-integrated into the explanation. Effective application of text details. A structured evaluation weighing benefits (efficiency, foreign exchange, FDI) against costs (fiscal strain, external vulnerability, MNC exploitation) is provided, culminating in a logical conclusion.
* **Level 5 (13–15 marks):** Synthesis and evaluation are outstanding. The candidate demonstrates a sophisticated appreciation of the complexities of changing development strategies. Economic terms are defined precisely, diagrams are flawless and deeply integrated, and the final judgment is nuanced, well-reasoned, and strongly rooted in the context of Vanda's low-income agricultural economy.

Wondering how well you actually know this?

Thinka is an AI practice app for DSE students — unlimited questions, instant auto-marking, and detailed step-by-step solutions. 100,000+ students use it to confirm they actually know it, not just think they do.

Start Practising Free See pricing

Want more questions like this? Practice unlimited on Thinka — instant answers included.

Start Practising Free