ECS2602: MACROECONOMICS II VERIFIED EXAM QUESTIONS
AND ANSWERS - LATEST VERSION 2026/2027
1. What is Gross Domestic Product (GDP)?
ANSWER : GDP is the total monetary value of all final goods and services
produced within a country's borders during a specific time period, typically a year
or quarter.
2. What is the difference between GDP and GNP?
ANSWER : GDP measures output within a country's borders regardless of who
produces it, while GNP (Gross National Product) measures output produced by a
country's residents regardless of where it is produced.
3. What are the three approaches to measuring GDP?
ANSWER : The three approaches are: (1) the expenditure approach (C + I + G +
NX), (2) the income approach (sum of all factor incomes), and (3) the
production/value-added approach (sum of value added at each stage of production).
4. What is the expenditure approach to GDP?
ANSWER : The expenditure approach sums all spending on final goods and
services: GDP = C + I + G + (X − M), where C = consumption, I = investment, G
= government spending, X = exports, and M = imports.
5. What is the income approach to GDP?
ANSWER : The income approach adds all factor incomes including wages, rent,
interest, and profits earned in production. It equals GDP because every dollar of
output generates income for someone.
6. What is nominal GDP?
ANSWER : Nominal GDP is the total value of goods and services produced in a
country, measured at current market prices without adjustment for inflation.
7. What is real GDP?
, ANSWER : Real GDP is nominal GDP adjusted for price level changes using a
base-year price index. It reflects actual changes in output, eliminating the effect of
inflation.
8. How is the GDP deflator calculated?
ANSWER : GDP Deflator = (Nominal GDP / Real GDP) × 100. It measures the
average price level of all goods and services included in GDP relative to a base
year.
9. What is Net National Product (NNP)?
ANSWER : NNP = GNP − Depreciation (Capital Consumption Allowance). It
represents the value of output net of the capital used up in production.
10. What is National Income (NI)?
ANSWER : National Income = NNP − Indirect Business Taxes + Subsidies. It
represents the total income earned by a nation's factors of production.
11. What is Personal Income (PI)?
ANSWER : Personal Income is the income received by households before
personal taxes. PI = NI − Corporate retained earnings − Social insurance taxes +
Transfer payments.
12. What is Disposable Personal Income (DPI)?
ANSWER : DPI = Personal Income − Personal Taxes. It is the income available to
households for consumption and saving after paying taxes.
13. What are transfer payments and are they included in GDP?
ANSWER : Transfer payments are government payments for which no good or
service is received in return (e.g., pensions, unemployment benefits). They are
NOT included in GDP because they do not represent production of new goods or
services.
14. What is the circular flow of income?
ANSWER : The circular flow model shows how money flows between
households and firms through product and factor markets. Households supply
factors to firms and receive income; firms produce goods and services sold to
households.
15. What are leakages and injections in the circular flow model?
, ANSWER : Leakages are withdrawals from the circular flow: saving, taxes, and
imports. Injections add to the flow: investment, government spending, and exports.
Equilibrium requires total leakages = total injections.
16. What is value added and why is it used in GDP measurement?
ANSWER : Value added is the difference between a firm's sales revenue and the
cost of its intermediate inputs. It is used to avoid double-counting in GDP by
counting only the value added at each stage of production.
17. What is the difference between final goods and intermediate goods?
ANSWER : Final goods are purchased by the ultimate consumer for end use,
while intermediate goods are used as inputs in producing other goods. Only final
goods are counted in GDP to avoid double-counting.
18. What is gross investment vs. net investment?
ANSWER : Gross investment is total spending on new capital goods including
replacement of depreciated capital. Net investment = Gross investment −
Depreciation. Net investment represents the actual addition to the capital stock.
19. What items are NOT counted in GDP?
ANSWER : Non-market activities (household work), underground economy
transactions, financial transactions (stock and bond purchases), transfer payments,
and second-hand goods sales are not counted in GDP.
20. What are the limitations of GDP as a measure of welfare?
ANSWER : GDP does not account for income distribution, environmental
degradation, non-market production, leisure time, quality of life, crime levels, or
the shadow/informal economy. It can overstate or understate actual societal
wellbeing.
TOPIC 2: Consumption and Saving
21. What is the Keynesian consumption function?
ANSWER : The Keynesian consumption function is C = a + bY, where C is
consumption, a is autonomous consumption (consumption at zero income), b is the
Marginal Propensity to Consume (MPC), and Y is disposable income.
22. What is the Marginal Propensity to Consume (MPC)?
, ANSWER : MPC = ΔC/ΔY. It measures the fraction of each additional unit of
income that is spent on consumption. It ranges between 0 and 1.
23. What is the Marginal Propensity to Save (MPS)?
ANSWER : MPS = ΔS/ΔY. It measures the fraction of each additional unit of
income saved. MPC + MPS = 1.
24. What is the Average Propensity to Consume (APC)?
ANSWER : APC = C/Y. It is the ratio of total consumption to total income.
According to Keynes, APC falls as income rises.
25. What is the Average Propensity to Save (APS)?
ANSWER : APS = S/Y. It is the ratio of total saving to total income. APC + APS
= 1 at all income levels.
26. What is the Life-Cycle Hypothesis of consumption?
ANSWER : Proposed by Modigliani, the Life-Cycle Hypothesis states that
individuals plan their consumption over their lifetime, saving during working years
and dissaving in retirement to maintain a stable consumption path.
27. What is the Permanent Income Hypothesis?
ANSWER : Proposed by Friedman, the PIH states that consumption depends on
permanent (long-run average expected) income, not current income. Temporary
income changes have little effect on consumption.
28. What is the distinction between autonomous and induced consumption?
ANSWER : Autonomous consumption is the minimum level of consumption that
occurs even with zero income (the intercept 'a'). Induced consumption is the
portion of consumption that depends on income (bY).
29. Why is the consumption function important in macroeconomics?
ANSWER : The consumption function determines the size of the multiplier,
shapes aggregate demand, and explains how changes in income affect spending in
the economy. It is central to Keynesian analysis.
30. What factors can shift the consumption function?
ANSWER : Shifts occur due to changes in wealth, consumer confidence, interest
rates, expectations about future income, credit availability, and changes in taxation
or transfer payments.
31. What is the saving function?
AND ANSWERS - LATEST VERSION 2026/2027
1. What is Gross Domestic Product (GDP)?
ANSWER : GDP is the total monetary value of all final goods and services
produced within a country's borders during a specific time period, typically a year
or quarter.
2. What is the difference between GDP and GNP?
ANSWER : GDP measures output within a country's borders regardless of who
produces it, while GNP (Gross National Product) measures output produced by a
country's residents regardless of where it is produced.
3. What are the three approaches to measuring GDP?
ANSWER : The three approaches are: (1) the expenditure approach (C + I + G +
NX), (2) the income approach (sum of all factor incomes), and (3) the
production/value-added approach (sum of value added at each stage of production).
4. What is the expenditure approach to GDP?
ANSWER : The expenditure approach sums all spending on final goods and
services: GDP = C + I + G + (X − M), where C = consumption, I = investment, G
= government spending, X = exports, and M = imports.
5. What is the income approach to GDP?
ANSWER : The income approach adds all factor incomes including wages, rent,
interest, and profits earned in production. It equals GDP because every dollar of
output generates income for someone.
6. What is nominal GDP?
ANSWER : Nominal GDP is the total value of goods and services produced in a
country, measured at current market prices without adjustment for inflation.
7. What is real GDP?
, ANSWER : Real GDP is nominal GDP adjusted for price level changes using a
base-year price index. It reflects actual changes in output, eliminating the effect of
inflation.
8. How is the GDP deflator calculated?
ANSWER : GDP Deflator = (Nominal GDP / Real GDP) × 100. It measures the
average price level of all goods and services included in GDP relative to a base
year.
9. What is Net National Product (NNP)?
ANSWER : NNP = GNP − Depreciation (Capital Consumption Allowance). It
represents the value of output net of the capital used up in production.
10. What is National Income (NI)?
ANSWER : National Income = NNP − Indirect Business Taxes + Subsidies. It
represents the total income earned by a nation's factors of production.
11. What is Personal Income (PI)?
ANSWER : Personal Income is the income received by households before
personal taxes. PI = NI − Corporate retained earnings − Social insurance taxes +
Transfer payments.
12. What is Disposable Personal Income (DPI)?
ANSWER : DPI = Personal Income − Personal Taxes. It is the income available to
households for consumption and saving after paying taxes.
13. What are transfer payments and are they included in GDP?
ANSWER : Transfer payments are government payments for which no good or
service is received in return (e.g., pensions, unemployment benefits). They are
NOT included in GDP because they do not represent production of new goods or
services.
14. What is the circular flow of income?
ANSWER : The circular flow model shows how money flows between
households and firms through product and factor markets. Households supply
factors to firms and receive income; firms produce goods and services sold to
households.
15. What are leakages and injections in the circular flow model?
, ANSWER : Leakages are withdrawals from the circular flow: saving, taxes, and
imports. Injections add to the flow: investment, government spending, and exports.
Equilibrium requires total leakages = total injections.
16. What is value added and why is it used in GDP measurement?
ANSWER : Value added is the difference between a firm's sales revenue and the
cost of its intermediate inputs. It is used to avoid double-counting in GDP by
counting only the value added at each stage of production.
17. What is the difference between final goods and intermediate goods?
ANSWER : Final goods are purchased by the ultimate consumer for end use,
while intermediate goods are used as inputs in producing other goods. Only final
goods are counted in GDP to avoid double-counting.
18. What is gross investment vs. net investment?
ANSWER : Gross investment is total spending on new capital goods including
replacement of depreciated capital. Net investment = Gross investment −
Depreciation. Net investment represents the actual addition to the capital stock.
19. What items are NOT counted in GDP?
ANSWER : Non-market activities (household work), underground economy
transactions, financial transactions (stock and bond purchases), transfer payments,
and second-hand goods sales are not counted in GDP.
20. What are the limitations of GDP as a measure of welfare?
ANSWER : GDP does not account for income distribution, environmental
degradation, non-market production, leisure time, quality of life, crime levels, or
the shadow/informal economy. It can overstate or understate actual societal
wellbeing.
TOPIC 2: Consumption and Saving
21. What is the Keynesian consumption function?
ANSWER : The Keynesian consumption function is C = a + bY, where C is
consumption, a is autonomous consumption (consumption at zero income), b is the
Marginal Propensity to Consume (MPC), and Y is disposable income.
22. What is the Marginal Propensity to Consume (MPC)?
, ANSWER : MPC = ΔC/ΔY. It measures the fraction of each additional unit of
income that is spent on consumption. It ranges between 0 and 1.
23. What is the Marginal Propensity to Save (MPS)?
ANSWER : MPS = ΔS/ΔY. It measures the fraction of each additional unit of
income saved. MPC + MPS = 1.
24. What is the Average Propensity to Consume (APC)?
ANSWER : APC = C/Y. It is the ratio of total consumption to total income.
According to Keynes, APC falls as income rises.
25. What is the Average Propensity to Save (APS)?
ANSWER : APS = S/Y. It is the ratio of total saving to total income. APC + APS
= 1 at all income levels.
26. What is the Life-Cycle Hypothesis of consumption?
ANSWER : Proposed by Modigliani, the Life-Cycle Hypothesis states that
individuals plan their consumption over their lifetime, saving during working years
and dissaving in retirement to maintain a stable consumption path.
27. What is the Permanent Income Hypothesis?
ANSWER : Proposed by Friedman, the PIH states that consumption depends on
permanent (long-run average expected) income, not current income. Temporary
income changes have little effect on consumption.
28. What is the distinction between autonomous and induced consumption?
ANSWER : Autonomous consumption is the minimum level of consumption that
occurs even with zero income (the intercept 'a'). Induced consumption is the
portion of consumption that depends on income (bY).
29. Why is the consumption function important in macroeconomics?
ANSWER : The consumption function determines the size of the multiplier,
shapes aggregate demand, and explains how changes in income affect spending in
the economy. It is central to Keynesian analysis.
30. What factors can shift the consumption function?
ANSWER : Shifts occur due to changes in wealth, consumer confidence, interest
rates, expectations about future income, credit availability, and changes in taxation
or transfer payments.
31. What is the saving function?
