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    Country A, Country B, and Country C are experiencing different economic challenges. Country A has recently implemented a subsidy on agricultural products to support domestic farmers. Meanwhile, Country B faces high inflation, leading to an increase in interest rates by its central bank. Country C, an export-oriented economy, is experiencing a decline in its balance of trade due to global demand fluctuations.

    Question
    HLPaper 3

    Country A, Country B, and Country C are experiencing different economic challenges. Country A has recently implemented a subsidy on agricultural products to support domestic farmers. Meanwhile, Country B faces high inflation, leading to an increase in interest rates by its central bank. Country C, an export-oriented economy, is experiencing a decline in its balance of trade due to global demand fluctuations.

    ###Table 1: Market Data for Country A’s Agricultural Goods**

    Price per Unit ($)Quantity Demanded (thousands)Quantity Supplied (thousands)
    10200150
    15180180
    20160210
    25140240

    The government of Country A has decided to provide a subsidy of $5 per unit on agricultural goods.

    Table 2: Inflation and Interest Rates in Country B

    YearInflation Rate (%)Interest Rate (%)
    20213.24.5
    20225.86.0
    20237.17.5
    20249.39.0

    Table 3: Trade Data for Country C

    YearExports ($ billion)Imports ($ billion)
    20218570
    20229078
    20238882
    20248085

    The government of Country C is considering trade policies to address the trade imbalance.

    1.

    Using information from Table 1, calculate the price elasticity of demand (PED) when the price changes from 15to15 to 15to20.

    [2]
    Verified
    Solution
    1. Correct approach:

    The price increases from $15 to $20, while quantity demanded falls from 180 to 160 (thousands).

    • Percentage change in quantity demanded = 160−180180×100≈−11.11%\frac{160 - 180}{180} \times 100 \approx -11.11\%180160−180​×100≈−11.11%.
    • Percentage change in price = 20−1515×100≈33.33%\frac{20 - 15}{15} \times 100 \approx 33.33\%1520−15​×100≈33.33%.

    1 mark

    1. Correct final answer:
    • PED = −11.11%33.33%≈(−)0.33\frac{-11.11\%}{33.33\%} \approx (-)0.3333.33%−11.11%​≈(−)0.33.

    1 mark

    2.

    Explain why the subsidy provided by Country A’s government is likely to affect the equilibrium price and quantity.

    [4]
    Verified
    Solution
    • A subsidy is a government payment that reduces producers’ costs of production. 1 mark
    • Lower production costs shift the supply curve to the right (increase in supply). 1 mark
    • With a greater supply at each possible price, the new market equilibrium generally results in a lower price for consumers. 1 mark
    • The lower price encourages more quantity demanded, leading to a higher equilibrium quantity exchanged in the market. 1 mark
    3.

    Using information from Table 2, calculate the percentage change in the inflation rate from 2021 to 2024.

    [2]
    Verified
    Solution
    1. Correct approach

    The inflation rate rises from 3.2% (2021) to 9.3% (2024).

    Percentage change=(9.3−3.2)3.2×100\text{Percentage change} = \frac{(9.3 - 3.2)}{3.2} \times 100Percentage change=3.2(9.3−3.2)​×100

    1 mark

    1. Correct final answer:

    Percentage change = (9.3−3.2)3.2×100≈190.63%\frac{(9.3 - 3.2)}{3.2} \times 100 \approx 190.63\%3.2(9.3−3.2)​×100≈190.63%.

    1 mark

    4.

    Using information from Table 2, calculate the difference between the real and nominal interest rates in 2023 if the expected inflation rate was 5.5%.

    [2]
    Verified
    Solution
    1. Correct approach:
    • Nominal interest rate in 2023 (inom_{nom}nom​) = 7.5%.
    • Real interest rate (ireal_{real}real​) = inom_{nom}nom​ − Expected Inflation Rate\text{Expected Inflation Rate}Expected Inflation Rate= 7.5% − 5.5% = 2.0%.

    1 mark

    1. Correct final answer:
    • Difference between the real and nominal interest rates = 2.0 percentage points.

    1 mark

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    5.

    Define the term balance of trade.

    [2]
    Verified
    Solution

    The balance of trade is the difference between the value of a country’s exports and the value of its imports of goods and services 1 mark

    over a given period, usually annually. 1 mark

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    6.

    Using information from Table 3, calculate the trade balance of Country C for the year 2024.

    [2]
    Verified
    Solution
    1. Correct approach:
    • Trade balance = Exports − Imports
    • Exports in 2024: $80 billion
    • Imports in 2024: $85 billion

    1 mark

    1. Correct final answer:
    • Trade balance = Exports − Imports = 80 − 85 = −$5 billion

    1 mark

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    7.

    Sketch a supply and demand diagram to illustrate the impact of the subsidy on Country A’s agricultural market.

    [2]
    Verified
    Solution

    Image

    • Correct labeling of axis and curves

    1 mark

    • Shows a shift of supply curve to the right, hence increasing the quantity supplied and profit while decreasing the cost of production

    1 mark

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    8.

    Using information from Table 3, explain how the trend in Country C’s trade data could affect its exchange rate.

    [4]
    Verified
    Solution

    Image

    • The data show that Country C’s trade surplus has been shrinking, turning into a deficit in 2024 (Exports USD 80 billion vs. Imports USD 85 billion).
    • A persistent or growing trade deficit means more spending on imports relative to income from exports, reducing net demand from D1D_1D1​ to D2D_2D2​ for the domestic currency in foreign exchange markets.
    • Lower net demand for the currency tends to put downward pressure on its value, resulting in a depreciation of the exchange rate from e1e_1e1​ to e2e_2e2​.

    2 marks for correct diagram OR explanation

    4 marks for correct diagram AND explanation

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    9.

    Using the text/data provided and your knowledge of economics, recommend a policy that Country B’s central bank could implement to control inflation while maintaining economic growth.

    [10]
    Verified
    Solution

    Below is an example answer:

    DEFINITION

    • Inflation: A sustained increase in the general price level.
    • Economic growth: An increase in a country's real output (real GDP) over a period time.

    MONETARY POLICY TO REDUCE INFLATION

    • Higher interest rates reduce inflationary pressures by discouraging consumption and investment, leading to lower aggregate demand.
    • The upward trend in Country B’s interest rates (4.5% to 9.0%) has attempted to tackle the inflation surge from 3.2% to 9.3%.
    • A targeted or gradual approach to further tightening can moderate price increases without severely harming domestic demand.

    Diagram

    • An aggregate demand (AD) and aggregate supply (AS) diagram, where contractionary monetary policy shifts AD to the left, reducing the price level (from P to P1).
    • The reduction in output should be kept minimal if the central bank raises rates gradually, preventing a sharp decline in real GDP.

    MAINTAINING ECONOMIC GROWTH

    • Excessively high interest rates risk reducing investment and consumption to the point of slowing real GDP growth.
    • A measured increase in rates can stabilize price expectations, reducing the likelihood of a wage-price spiral, while leaving enough room for businesses to borrow at feasible rates.
    • Sustained investor confidence depends on predictable policy. If the central bank clarifies its inflation target and commits to moderate adjustments, firms can plan long-term capital investments without fear of abrupt borrowing cost spikes.

    CONCLUSION

    • A carefully calibrated, incremental rise in the interest rate is recommended to bring inflation closer to a manageable level while preserving growth prospects.
    • This policy uses the central bank’s main instrument—monetary policy—to address inflation, referencing how prior rate increases have partially contained price rises.
    • By maintaining a balance between controlling excessive price pressures and supporting business expansion, Country B can achieve lower inflation in tandem with steady economic growth.

    (Other recommended policies may also be valid).

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