Q: Suppose a country’s nominal GDP increases from $$100 billion to 120 $$billion in one year, but the price level also rises by 20%. What is the real GDP growth rate?

$$\text{Real GDP growth rate} = \frac{120}{1.2} - 100 = 0\%$$

Q: Which of the following is the correct formula for calculating the Gini coefficient for three people with incomes of 12, 4, and 2?

$$g = 0.5 \times \frac{(10 + 8 + 2)/3}{(12 + 4 + 2)/3}$$

Question 1

Which of the following best explains why GDP per capita is often adjusted using Purchasing Power Parity (PPP) when comparing living standards across countries?

Accepted Answer

PPP adjustment accounts for differences in the prices of non-traded goods and services, allowing for more accurate comparisons of real purchasing power.

Question 2

Suppose a country’s nominal GDP increases from $$100 billion to 120 $$billion in one year, but the price level also rises by 20%. What is the real GDP growth rate?

Accepted Answer

$$	ext{Real GDP growth rate} = \frac{120}{1.2} - 100 = 0\%$$

Question 3

According to the Malthusian model, what happens to average living standards if the population increases while the amount of land remains fixed?

Accepted Answer

Average living standards fall due to diminishing average product of labor.

Question 4

Which of the following is the correct formula for calculating the Gini coefficient for three people with incomes of 12, 4, and 2?

Accepted Answer

$$g = 0.5 	imes \frac{(10 + 8 + 2)/3}{(12 + 4 + 2)/3}$$

Question 5

A country’s GDP per capita rises from $$10,000 to 10$$,500 in one year. What is the growth rate?

Accepted Answer

$$\frac{10,500 - 10,000}{10,000} = 0.05 = 5\%$$

Question 6

Which of the following best describes the Lorenz curve?

Accepted Answer

A graphical representation of the cumulative share of income received by the cumulative share of the population, ordered from poorest to richest.

Question 7

If the Gini coefficient for a country is 0.9, what does this indicate about income distribution?

Accepted Answer

There is a high degree of income inequality.

Question 8

Which of the following is a limitation of using GDP as a measure of living standards?

Accepted Answer

GDP does not account for the depletion of natural resources.

Question 9

In the context of the Lewis Dual Economy Model, what is the main driver of workers moving from the subsistence sector to the capitalist sector?

Accepted Answer

Technological innovation and higher productivity in the capitalist sector.

Question 10

Which of the following best explains the 'hockey stick' pattern in historical living standards?

Accepted Answer

A long period of stable living standards followed by a sharp rise due to continuous technological change.

Question 11

Why might using market exchange rates to compare GDP across countries be misleading?

Accepted Answer

Market exchange rates do not account for differences in the prices of non-traded goods and services.

Question 12

If a country’s Lorenz curve is very close to the line of perfect equality, what does this indicate?

Accepted Answer

The country has perfect income equality.

Question 13

Which of the following is NOT a characteristic of a developmental state?

Accepted Answer

The government allows markets to operate without any intervention.

Question 14

According to the Malthusian model, what is the likely long-term effect of a one-time technological improvement in agriculture?

Accepted Answer

A temporary increase in living standards followed by population growth that returns living standards to subsistence.

Question 15

Which of the following best describes the effect of redistributive policies on the Gini coefficient, as seen in the Netherlands?

Accepted Answer

Redistributive policies reduce the Gini coefficient, indicating less income inequality.

Question 16

If the area between the Lorenz curve and the line of perfect equality (area A) is 0.2 and the area under the Lorenz curve (area B) is 0.3, what is the Gini coefficient?

Accepted Answer

$$g = \frac{0.2}{0.2 + 0.3} = 0.4$$

Question 17

Which of the following is a key institutional feature that enabled the escape from the Malthusian trap and the rise in living standards?

Accepted Answer

The development of capitalist institutions such as private property, markets, and firms.

Question 18

If three people have incomes of R6,000, R10,000, and R12,000, what is the average difference between every possible pair?

Accepted Answer

R4,000

Question 19

Which of the following best describes the main insight of the Lewis Dual Economy Model?

Accepted Answer

The capitalist sector absorbs surplus labor from the subsistence sector, raising overall productivity.

Microeconomics Study Guide: Prosperity, Inequality, and Planetary Limits

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