Quiz: Money, Demand, Supply and Interest — 68 questions

1. Which area of economics examines the economy as a whole and the combined effects of individual choices?

A. Macroeconomics examines economy-wide aggregates and interactions

B. Macroeconomics examines individual firms under fixed conditions

C. Microeconomics examines economy-wide aggregates and interactions

D. Microeconomics examines national income and general prices

Answer: (A)

Explanation

Macroeconomics focuses on the economy as a whole and the combined effects of individual decisions. Microeconomics instead studies individuals or relatively small sectors, often using the ceteris paribus assumption.

2. Which item is a main macroeconomic aggregate?

A. The price of one product

B. The general price level

C. The output of one firm

D. The wage of one employee

Answer: (B)

Explanation

The general price level is one of the principal aggregates used to measure macroeconomic performance. The other choices concern individual products, firms, or workers rather than the economy-wide level.

3. If consumption is 500, investment is 150, government demand is 200, exports are 100, and imports are 80, what is aggregate demand?

A. $AD = 950$

B. $AD = 1{,}030$

C. $AD = 870$

D. $AD = 790$

Answer: (C)

Explanation

Using $AD = C + I + G + X - M$ gives $500 + 150 + 200 + 100 - 80 = 870$. Imports are subtracted because they represent spending on foreign rather than domestic output.

4. Why are nominal and real values distinguished when measuring national output?

A. Different goods have identical physical units, while monetary values measure only production quantities

B. Money measures household preferences, while real values exclude all changes in national production

C. Physical units provide a complete aggregate, while nominal values measure employment changes

D. Different goods require a common monetary measure, while price changes must be separated from quantity changes

Answer: (D)

Explanation

Goods and services have different physical units, so money provides a common measure; separating nominal from real values helps remove the effect of price changes. The other choices misstate why monetary aggregation is needed.

5. What is the key distinction between aggregate demand and national expenditure?

A. Aggregate demand is planned expenditure, whereas national expenditure is actual spending

B. Aggregate demand is actual spending, whereas national expenditure is planned production

C. Aggregate demand is actual output, whereas national expenditure is planned consumption

D. Aggregate demand is planned production, whereas national expenditure is actual income

Answer: (A)

Explanation

Aggregate demand describes what households, firms, government, and foreigners plan to spend. National expenditure records the amount actually spent during a period.

6. What does aggregate supply measure?

A. The total quantity of money firms plan to hold during a period

B. The total income received by factors of production during a period

C. The total value of final goods and services firms wish to supply over a period

D. The total value of final goods and services households actually purchase over a period

Answer: (C)

Explanation

Aggregate supply is planned production: it measures the total value of final goods and services that firms wish to supply. Actual production is represented by national product rather than aggregate supply.

7. What condition defines macroeconomic equilibrium?

A. Aggregate supply exceeds aggregate demand, causing prices and national income to rise

B. National expenditure equals transfers, leaving factor incomes unchanged

C. Aggregate demand exceeds aggregate supply, causing inventories and national income to fall

D. Aggregate demand equals aggregate supply, leaving no forces that change national income

Answer: (D)

Explanation

Macroeconomic equilibrium occurs when planned aggregate demand equals planned aggregate supply, so there is no pressure to change national income. A persistent excess of demand or supply would create adjustment pressures.

8. If investment is 80, government spending is 60, exports are 40, saving is 90, taxes are 50, and imports are 40, what does the injections–withdrawals condition indicate?

A. The economy has excess injections because injections equal 190

B. The economy is in equilibrium because both totals equal 180

C. The economy has excess withdrawals because withdrawals equal 190

D. The economy is in equilibrium because both totals equal 170

Answer: (B)

Explanation

The equilibrium condition is $I + G + X = S + T + M$. Here injections equal $80 + 60 + 40 = 180$ and withdrawals equal $90 + 50 + 40 = 180$, so the condition holds.

9. What did Keynes emphasize in The General Theory of Employment, Interest and Money, published in 1936?

A. Investment, government spending, taxation, and exports as key business-cycle variables

B. Money supply as the sole determinant of employment and economic fluctuations

C. Market clearing as the main explanation for every short-run economic movement

D. Limited government intervention as the central solution to prolonged depressions

Answer: (A)

Explanation

Keynes’s 1936 work emphasized income, expenditure, and policy-related variables such as investment, government spending, taxation, and exports. Earlier classical approaches placed greater emphasis on money and self-regulating markets.

10. Which contrast best describes classical and Keynesian macroeconomics?

A. Classical analysis favors limited intervention, whereas Keynesian analysis allows an active government role

B. Classical analysis favors active intervention, whereas Keynesian analysis relies on markets left alone

C. Classical analysis rejects markets, whereas Keynesian analysis assumes markets clear rapidly

D. Classical analysis focuses on exports, whereas Keynesian analysis excludes policy variables

Answer: (A)

Explanation

Classical macroeconomics generally argues that markets perform best with limited intervention, while Keynesian macroeconomics allows government action to improve economic performance. The other choices reverse or distort this distinction.

11. Which set of assumptions forms the foundation of new classical macroeconomics?

A. Agents maximize, expectations are rational, and markets clear

B. Agents minimize information, expectations are uncertain, and markets require permanent controls

C. Agents maximize profits, expectations are fixed, and governments set all prices

D. Agents follow habits, expectations are adaptive, and markets remain continuously rationed

Answer: (A)

Explanation

The new classical school assumes that economic agents maximize, expectations are rational, and markets clear. The alternatives replace these assumptions with behavioral or institutional claims not associated with the school’s core framework.

12. What does rational expectations imply about people’s responses to government policy?

A. People use available information to form statistically best predictions and learn the effects of policy

B. People ignore policy information and respond through recurring errors in prediction

C. People understand policy only after it ends and cannot incorporate it into current decisions

D. People base forecasts on past outcomes while disregarding changes in economic policy

Answer: (A)

Explanation

Rational expectations means people use available information to make statistically best predictions and eventually understand government policies. Consequently, policymakers cannot fool most people most of the time through predictable actions.

13. Which contrast best distinguishes Classical economists from New Keynesians regarding market adjustment?

A. Classical economists emphasize rigid prices, whereas New Keynesians expect flexible wages to clear markets.

B. Classical economists rely on past events, whereas New Keynesians use all available information to forecast policy.

C. Classical economists favor money-supply rules, whereas New Keynesians reject explanations based on adjustment costs.

D. Classical economists expect flexible prices to clear markets, whereas New Keynesians emphasize rigidities that can sustain unemployment.

Answer: (D)

Explanation

Classical economists assume flexible wages and prices continuously clear markets, while New Keynesians explain unemployment through information problems and adjustment costs. The second option reverses the central distinction between the two schools.

14. If households correctly anticipate a predictable tax change using currently available information, which expectation concept does this illustrate?

A. Rational expectations, because predictions use available information to form statistically best forecasts.

B. Adaptive expectations, because predictions are revised from earlier economic outcomes.

C. Static expectations, because households assume current conditions will remain unchanged.

D. Retroactive expectations, because predictions depend on previously announced government decisions.

Answer: (A)

Explanation

Rational expectations involve using all available information to form statistically best predictions, so predictable policy is unlikely to systematically fool people. Adaptive expectations instead rely mainly on past events, making the second option incorrect.

15. Which monetary policy approach would a Monetarist most likely recommend to avoid repeated inflationary and contractionary disruptions?

A. A temporary reduction in the money supply whenever unemployment rises above its natural rate.

B. A discretionary sequence of expansions and contractions adjusted after each economic fluctuation.

C. A policy of changing government purchases whenever firms revise their production forecasts.

D. A fixed annual growth rule for the money supply, such as increasing it by 3 percent.

Answer: (D)

Explanation

Monetarists favor a predictable fixed annual money-supply growth rule because stop-go demand management can increase both inflation and unemployment. The second option describes the discretionary policy they oppose.

16. Why do New Classical economists argue that announced demand-management policies may have little temporary effect on real output?

A. Adaptive expectations cause households to ignore announcements until past outcomes confirm them.

B. Flexible wages prevent firms from responding to information about government policy.

C. Information problems prevent producers from incorporating announced policy into their forecasts.

D. Rational producers anticipate the policy's effects and adjust their decisions before output changes.

Answer: (D)

Explanation

New Classical economists argue that producers with rational expectations anticipate announced policy and adjust accordingly, limiting its temporary effect on real output. The third option describes adaptive rather than rational expectations.

17. What does long-run aggregate supply represent in the aggregate demand and supply model?

A. The natural level of output, denoted $Q_n$, when the economy is in long-run equilibrium.

B. The temporary output level created when prices have not yet adjusted to a demand shock.

C. The amount of output produced when unemployment rises above its natural rate.

D. The price level associated with a short-run increase in aggregate demand.

Answer: (A)

Explanation

Long-run aggregate supply represents natural output, denoted $Q_n$, when the economy has reached long-run equilibrium. Temporary output changes are associated with short-run aggregate supply rather than its long-run counterpart.

18. What is the initial macroeconomic effect of a fall in aggregate demand from AD2 to AD1?

A. The price level remains stable, while real GNP rises and unemployment declines.

B. The price level and real GNP rise, while unemployment falls below its natural rate.

C. Real GNP falls, but the price level rises as unemployment returns to its natural rate.

D. The price level and real GNP fall, while unemployment rises above its natural rate.

Answer: (D)

Explanation

A decline in aggregate demand initially reduces the price level and real GNP and raises unemployment above its natural rate. The second option describes the typical initial effects of rising rather than falling aggregate demand.

19. Which situation represents a deflationary gap rather than an inflationary gap?

A. Real output is above its natural level and unemployment falls below its natural rate.

B. Real output equals its natural level while the price level increases gradually.

C. Real output is below its natural level and unemployment exceeds its natural rate.

D. Real output declines while unemployment remains equal to its natural rate.

Answer: (C)

Explanation

A deflationary gap exists when output is below natural output and unemployment is above its natural rate. The second option describes an inflationary gap, in which output exceeds its natural level and unemployment is below its natural rate.

20. According to the Classical view, what is the long-run effect of a change in aggregate demand?

A. It changes the general price level without changing full-employment output.

B. It raises employment permanently because wages adjust upward with demand.

C. It changes full-employment output while leaving the general price level unchanged.

D. It lowers unemployment temporarily without affecting either prices or output.

Answer: (A)

Explanation

Classical economists argue that aggregate-demand changes affect the general price level but not full-employment output. Therefore, they view government demand management as ineffective for changing long-run output and employment.

21. What does the circular flow describe in a two-sector economy?

A. The exchange of financial assets between banks and governments during monetary policy operations.

B. The continual movement of money, goods, and services between households and firms through economic activity.

C. The one-way transfer of income from firms to households without corresponding production or consumption.

D. The movement of imported goods and foreign currency between domestic consumers and overseas producers.

Answer: (B)

Explanation

The circular flow describes the ongoing movement of money, goods, and services between households and business firms through production, consumption, and capital formation. The other options focus on narrower transactions that do not describe the household-firm circular system.

22. In a two-sector economy, if consumption is $C = 800$ and investment is $I = 200$, what is total income?

A. $Y = 1{,}200$

B. $Y = 1{,}000$

C. $Y = 800$

D. $Y = 600$

Answer: (B)

Explanation

The two-sector income identity is $Y = C + I$, so $Y = 800 + 200 = 1{,}000$. Subtracting investment from consumption or omitting one component would not satisfy the identity.

23. Which statement correctly distinguishes real flows from money flows in the circular economy?

A. Factors move from households to firms and products move to households, while payments move in the opposite directions.

B. Money moves between households and firms, whereas real flows refer to changes in the general price level.

C. Factors move from firms to households and products move from households to firms, while payments follow those flows.

D. Payments move from households to firms and products move from firms to households in the same direction.

Answer: (A)

Explanation

Real flows consist of factor services supplied to firms and goods and services supplied to households, while money payments move in the opposite directions. The second option incorrectly makes payments and products move together.

24. Which activity correctly matches the roles of households and business firms in the two-sector model?

A. Households employ factors and sell final output, while firms supply labor and consume household products.

B. Households collect business revenue, while firms receive factor services from households without producing output.

C. Households produce goods for firms, while firms provide labor and purchase household consumption services.

D. Households supply factors and consume final output, while firms employ factors and sell produced goods.

Answer: (D)

Explanation

Households provide factors of production and consume final goods, whereas firms hire those factors, produce output, and sell goods and services. The second option reverses the roles of households and firms.

25. Which statement correctly distinguishes injections from leakages in a circular-flow model?

A. Injections represent taxation, whereas leakages represent government expenditure.

B. Injections increase spending, whereas leakages reduce spending.

C. Injections reduce spending, whereas leakages increase spending.

D. Injections measure production, whereas leakages measure household income.

Answer: (B)

Explanation

Injections add expenditure to the circular flow, while leakages withdraw spending from it. The opposite relationship is the central misconception represented by the second option.

26. Which transaction pattern correctly describes the roles of households and businesses in the two-sector circular-flow model?

A. Households sell factor services and buy final output, while businesses pay factor incomes and sell goods.

B. Households save all factor income, while businesses purchase household labor without selling final output.

C. Households buy factor services and sell final output, while businesses receive factor incomes and buy goods.

D. Households provide government services and buy exports, while businesses collect taxes and sell imports.

Answer: (A)

Explanation

Households supply labor and other factor services to businesses and use their income to purchase goods and services. Businesses demand those factors, pay factor incomes, and supply final output; they do not reverse these roles.

27. Which set of conditions belongs to the two-sector circular-flow model?

A. An open economy with foreign trade, government taxation, public spending, and business production.

B. An open economy with unsold inventories, public transfers, imports, exports, and household production.

C. A closed economy with business production, complete sales, full consumption, and no government transactions.

D. A closed economy with household production, compulsory saving, government spending, and foreign investment.

Answer: (C)

Explanation

The two-sector model assumes households and businesses operate in a closed economy with production in the business sector and household income spent on consumption. Government, foreign trade, and other external transactions are excluded.

28. What condition represents equilibrium in a four-sector open circular-flow model?

A. Savings, taxes, and imports equal investment, government expenditure, and exports.

B. Investment, imports, and government expenditure equal savings, taxes, and exports.

C. Consumption, taxes, and exports equal savings, government expenditure, and imports.

D. Savings, investment, and taxes equal consumption, imports, and government expenditure.

Answer: (A)

Explanation

Equilibrium requires total leakages—savings, taxes, and imports—to equal total injections—investment, government expenditure, and exports. The other combinations incorrectly classify or match the flow components.

29. What does national income accounting systematically measure?

A. The profitability of individual firms without measuring economy-wide production.

B. Aggregate economic activity, especially national income and its components, over a given period.

C. The distribution of household wealth across regions at a single point in time.

D. The quantity of money supplied by commercial banks during a financial year.

Answer: (B)

Explanation

National income accounting measures aggregate economic activity, including national income and its components, over a specified period. Wealth distribution, firm profitability, and money supply are different economic measures.

30. Which definition correctly describes gross national product?

A. The value of intermediate and final goods produced by domestic firms during a given period.

B. The income earned by foreign-owned resources operating inside a country's economy.

C. The market value of final output produced by resources owned by a country's citizens, wherever production occurs.

D. The market value of final output produced within a country's borders, regardless of resource ownership.

Answer: (C)

Explanation

GNP counts final goods and services generated by resources owned and supplied by a country's citizens, whether production occurs domestically or abroad. Production within national borders is the defining basis of GDP, not GNP.

31. If net factor income is negative, how does gross national product compare with gross domestic product?

A. GNP equals GDP because net factor income does not affect the relationship between them.

B. GNP is less than GDP because factor income paid abroad exceeds factor income received from abroad.

C. GNP is greater than GDP because foreign production adds more to national ownership income.

D. GNP is less than GDP because domestic production is excluded from national accounting.

Answer: (B)

Explanation

The relationship is $GNP = GDP + NFI$, so a negative net factor income makes GNP smaller than GDP. The second option reverses the effect of the sign of net factor income.

32. Which approach is not one of the standard methods for measuring gross national product?

A. The population-count approach

B. The income approach

C. The product or value-added approach

D. The expenditure approach

Answer: (A)

Explanation

GNP can be measured through the product or value-added, expenditure, and income approaches. Counting population is not a method for measuring the value of national production.

33. How do nominal GNP and real GNP differ in their treatment of prices?

A. Both measures use current-period prices, but real GNP excludes government expenditure.

B. Nominal GNP uses current-period prices, whereas real GNP uses constant base-period prices.

C. Nominal GNP uses base-period prices, whereas real GNP uses current-period prices.

D. Both measures use base-period prices, but nominal GNP excludes foreign trade.

Answer: (B)

Explanation

Nominal GNP values output using prices from the current period, while real GNP uses constant prices from a base period to remove the effect of price changes. The other options reverse or misstate this distinction.

34. If nominal GNP is 66 billion dollars and the price index is 110, what is real GNP?

A. 6 billion dollars

B. 72.6 billion dollars

C. 60 billion dollars

D. 176 billion dollars

Answer: (C)

Explanation

Applying $Real\ GNP = \frac{Nominal\ GNP \times 100}{Price\ index}$ gives $\frac{66 \times 100}{110}=60$ billion dollars. Dividing by 100 or multiplying by the price index would not remove the price effect correctly.

35. How is the annual inflation rate calculated from the consumer price index?

A. By dividing the previous year's CPI by the current CPI and multiplying by 100

B. By subtracting the current CPI from the previous CPI without using a percentage change

C. By dividing the change in CPI by the previous year's CPI and multiplying by 100

D. By adding the current and previous CPI values and dividing their sum by 100

Answer: (C)

Explanation

The annual inflation rate is calculated as $Inflation\ rate = \frac{CPI_t-CPI_{t-1}}{CPI_{t-1}} \times 100$. The previous year's CPI is the base for measuring the percentage change, so the alternative calculations use the wrong operation or denominator.

36. Which production is included in Gross National Product?

A. Final goods sold by foreign-owned firms domestically

B. Intermediate goods produced by domestic businesses

C. Final goods and services produced by resident-owned factors

D. All goods and services produced within national borders

Answer: (C)

Explanation

Gross National Product counts final production generated by factors owned by the country’s residents, regardless of where production occurs. Production within national borders is the defining basis of GDP, making the second option a GDP concept.

37. How does real GDP differ from nominal GDP?

A. Real GDP excludes services, while nominal GDP includes services

B. Real GDP uses base-year prices, while nominal GDP uses current prices

C. Real GDP uses current prices, while nominal GDP uses base-year prices

D. Real GDP measures income, while nominal GDP measures physical output

Answer: (B)

Explanation

Real GDP values output at base-year prices, allowing changes in physical production to be isolated. Nominal GDP uses current prices and therefore incorporates changes in the price level, unlike the second option.

38. If consumption is $900$, investment is $250$, government purchases are $300$, and net exports are $-50$, what is national output using the expenditure approach?

A. $1{,}500$

B. $1{,}400$

C. $1{,}100$

D. $1{,}350$

Answer: (B)

Explanation

The expenditure approach gives $Y=C+I+G+NX=900+250+300-50=1{,}400$. Net exports are negative here, so they reduce rather than increase total output.

39. What does disposable income represent for consumers?

A. Income remaining after businesses purchase capital equipment

B. Income spent on current goods and services during a period

C. Income earned by firms after subtracting production costs

D. Income available to allocate between consumption and saving

Answer: (D)

Explanation

Disposable income is the amount consumers can choose to spend or save during a period. The second option describes consumption, which is the portion of disposable income used for current purchases.

40. If disposable income is $4{,}000$ and consumption is $3{,}200$, how much is saving?

A. $4{,}000$

B. $3{,}200$

C. $800$

D. $1{,}200$

Answer: (C)

Explanation

Saving equals disposable income minus consumption, so $S=Y_d-C=4{,}000-3{,}200=800$. Consumption is the amount spent, whereas saving is the unconsumed portion of disposable income.

41. In the consumption function $C=a+bY_d$, what does $b$ represent?

A. The marginal propensity to import

B. The average amount saved from total income

C. The marginal propensity to consume

D. Autonomous consumption at zero disposable income

Answer: (C)

Explanation

In this function, $b$ measures how much consumption changes when disposable income changes, so it is the marginal propensity to consume. Autonomous consumption is represented by $a$, not by the slope coefficient.

42. A household’s consumption rises by $120$ when disposable income rises by $300$. What is its marginal propensity to consume?

A. $2.5$

B. $180$

C. $0.4$

D. $0.6$

Answer: (C)

Explanation

The marginal propensity to consume is $MPC=\frac{\Delta C}{\Delta Y_d}=\frac{120}{300}=0.4$. The ratio uses changes in consumption and disposable income, unlike an average propensity measure based on their total levels.

43. What condition characterizes equilibrium in a two-sector economy?

A. Consumption equals government purchases

B. Planned investment equals saving

C. Aggregate demand falls below aggregate supply

D. Investment equals disposable income

Answer: (B)

Explanation

In a two-sector economy, equilibrium requires aggregate demand to equal aggregate supply, which implies $C+I=C+S$ and therefore $I=S$. A gap between planned spending and output indicates disequilibrium rather than equilibrium.

44. Which expression gives equilibrium income in a closed economy with government and a constant tax rate?

A. $Y=\frac{1}{1-b+m}(a+I+G)$

B. $Y=\frac{1}{1-b(1-t)+m}(a+I+G)$

C. $Y=\frac{1}{1-b(1-t)}(a+I+G)$

D. $Y=\frac{1}{b(1-t)}(a-I-G)$

Answer: (C)

Explanation

For a closed economy with government and a constant tax rate, equilibrium income is $Y=\frac{1}{1-b(1-t)}(a+I+G)$. The expression containing $m$ applies to an open economy because it includes import leakage.

45. What is the role of the marginal propensity to import in the open-economy multiplier?

A. It adds a leakage term to the denominator

B. It raises autonomous consumption in the numerator

C. It replaces the tax rate in the consumption function

D. It converts investment demand into government spending

Answer: (A)

Explanation

The open-economy multiplier is $\frac{1}{1-b(1-t)+m}$, so the marginal propensity to import adds to the denominator and reduces the multiplier. Imports create a spending leakage rather than increasing autonomous consumption.

46. What typically happens to investment demand when the interest rate decreases?

A. Investment demand increases because borrowing becomes less costly

B. Investment demand becomes unrelated to changes in capital stock

C. Investment demand decreases because saving becomes less attractive

D. Investment demand stays fixed because interest rates affect consumption

Answer: (A)

Explanation

Investment demand has an inverse relationship with the interest rate: lower borrowing costs encourage firms to acquire capital. The second option reverses this relationship and does not describe the stated investment-demand response.

47. In a closed economy, which relationship must hold when private and government saving are combined into total saving?

A. Total saving equals net exports, so $S=X$.

B. Total saving equals consumption, so $S=C$.

C. Total saving equals investment, so $S=I$.

D. Total saving equals government purchases, so $S=G$.

Answer: (C)

Explanation

A closed economy has no rest-of-world sector, so total saving finances domestic investment and satisfies $S=I$. The net-export relationship applies to open-economy accounting rather than the closed-economy identity.

48. Which expression correctly measures private saving when transfers and interest income are included in income and taxes are subtracted?

A. $S_p=(Y+F+N-T)-C$

B. $S_p=(Y-T)-G$

C. $S_p=C-(Y+F+N-T)$

D. $S_p=T-F-N-G$

Answer: (A)

Explanation

Private saving is disposable income remaining after consumption, so it equals $S_p=(Y+F+N-T)-C$. The expression $T-F-N-G$ measures government saving rather than private saving.

49. If taxes are $T$, transfers are $F$, interest payments are $N$, and government purchases are $G$, how is government saving calculated?

A. $S_g=(Y+F+N-T)-C$

B. $S_g=C+I+G-T$

C. $S_g=T-F-N-G$

D. $S_g=T+F+N+G$

Answer: (C)

Explanation

Government saving is tax revenue minus transfers, interest payments, and purchases, represented by $S_g=T-F-N-G$. Private saving instead subtracts consumption from disposable income.

50. At what point does the Keynesian cross identify equilibrium nominal GNP?

A. Where aggregate nominal demand equals aggregate nominal supply

B. Where planned investment equals government purchases

C. Where aggregate nominal supply exceeds aggregate nominal demand

D. Where aggregate nominal demand exceeds aggregate nominal supply

Answer: (A)

Explanation

The Keynesian cross identifies equilibrium where aggregate nominal demand equals aggregate nominal supply. When demand differs from supply, the economy has a gap rather than equilibrium.

51. What occurs when aggregate nominal demand exceeds aggregate nominal supply in the Keynesian cross model?

A. Taxes rise automatically, reducing planned investment.

B. Inventories decline unexpectedly, encouraging production to rise.

C. Inventories accumulate unexpectedly, encouraging production to fall.

D. Consumption declines immediately, leaving production unchanged.

Answer: (B)

Explanation

An expansionary gap means demand exceeds supply, so firms experience unplanned inventory declines and respond by increasing production. Inventory accumulation and falling production characterize a contractionary gap.

52. Given $C=C_0+MPC\cdot Y$ and autonomous investment $I^*$, which expression gives equilibrium output?

A. $Y=(1-MPC)(C_0+I^*)$

B. $Y=\frac{1}{1-MPC}(C_0+I^*)$

C. $Y=\frac{1}{MPC}(C_0-I^*)$

D. $Y=\frac{1}{1+MPC}(C_0+I^*)$

Answer: (B)

Explanation

Equilibrium output is amplified by the reciprocal of the saving share, giving $Y=\frac{1}{1-MPC}(C_0+I^*)$. Multiplying by $1-MPC$ would reverse the multiplier effect rather than calculate equilibrium output.

53. If the marginal propensity to consume is $MPC=0.75$, what is the expenditure multiplier?

A. $K=0.25$

B. $K=0.75$

C. $K=4$

D. $K=1.75$

Answer: (C)

Explanation

The expenditure multiplier is $K=\frac{1}{1-MPC}=\frac{1}{1-0.75}=4$, so output changes four times the initial demand change. The value $0.25$ is the denominator, not its reciprocal.

54. Which government action is an example of fiscal policy aimed at changing aggregate demand?

A. Allowing firms to adjust inventories in response to unsold goods

B. Increasing government purchases to raise aggregate demand and employment

C. Changing the money supply to influence interest rates and investment

D. Changing import prices through movements in the exchange rate

Answer: (B)

Explanation

Fiscal policy uses government spending and taxation to influence aggregate demand, income, employment, and prices. Money-supply changes belong to monetary policy rather than fiscal policy.

55. In the three-sector model, which condition represents equilibrium between aggregate demand and aggregate supply?

A. $C+S+T=C-I-G$

B. $C+I+G=C+S+T$

C. $C+I+T=C+S+G$

D. $C+G+T=C+I+S$

Answer: (B)

Explanation

Aggregate demand is $AD=C+I+G$ and aggregate supply accounting is $AS=C+S+T$, so equilibrium requires $C+I+G=C+S+T$. Saving and taxes belong to the supply-side accounting expression, while investment and government purchases belong to demand.

56. With consumption $C=a+b(Y-T)$, lump-sum taxes $T$, investment $I$, and government purchases $G$, what is equilibrium income?

A. $Y=\frac{1}{1+b}(a+bT+I-G)$

B. $Y=\frac{1}{1-b}(a-bT+I+G)$

C. $Y=\frac{1}{1-b}(a+bT-I-G)$

D. $Y=(1-b)(a-bT+I+G)$

Answer: (B)

Explanation

Solving the equilibrium condition with consumption depending on disposable income yields $Y=\frac{1}{1-b}(a-bT+I+G)$. Lump-sum taxes reduce consumption through the term $-bT$, while investment and government purchases increase planned expenditure.

57. With a proportional income tax rate $t$, which expression gives equilibrium national income?

A. $Y = \frac{1}{1-b+bt}(a-bT+I+G)$

B. $Y = \frac{1}{1-b+g}(a-bT+I+G)$

C. $Y = \frac{1}{1-bt}(a-bT+I+G)$

D. $Y = \frac{1}{1-b}(a-bT+I+G)$

Answer: (A)

Explanation

A proportional tax changes the income-expenditure denominator to $1-b+bt$, producing the stated equilibrium expression. The expression with denominator $1-b$ omits the effect of proportional taxation.

58. If government expenditure and taxes increase by the same amount under a proportional income tax, what is the balanced-budget multiplier?

A. $\frac{\Delta Y}{\Delta G}=\frac{1}{1-b}$

B. $\frac{\Delta Y}{\Delta G}=\frac{1}{1-b+bt}$

C. $\frac{\Delta Y}{\Delta G}=1-b+bt$

D. $\frac{\Delta Y}{\Delta G}=\frac{1}{1-b+g}$

Answer: (B)

Explanation

The balanced-budget multiplier with proportional taxation is $\frac{1}{1-b+bt}$ when expenditure and taxes change together. The denominator $1-b+g$ belongs to a foreign trade multiplier rather than the balanced-budget case.

59. In a four-sector economy with proportional taxes, how does an increase in exports affect equilibrium income?

A. $\frac{\Delta Y}{\Delta X}=\frac{1}{1-b+bt}$

B. $\frac{\Delta Y}{\Delta X}=\frac{1}{1-b(1-t)+g}$

C. $\frac{\Delta Y}{\Delta X}=\frac{1}{1-b+g}$

D. $\frac{\Delta Y}{\Delta X}=1-b(1-t)+g$

Answer: (B)

Explanation

Proportional taxes modify the consumption term, so the four-sector foreign trade multiplier is $\frac{1}{1-b(1-t)+g}$. The expression $\frac{1}{1-b+g}$ applies when proportional taxes are not included.

60. What does the foreign trade multiplier equal when linear consumption and imports are present without proportional taxes?

A. $\frac{\Delta Y}{\Delta X}=\frac{1}{1-b+bt}$

B. $\frac{\Delta Y}{\Delta X}=\frac{1}{1-b+g}$

C. $\frac{\Delta Y}{\Delta X}=\frac{1}{1-b(1-t)+g}$

D. $\frac{\Delta Y}{\Delta X}=1-b+g$

Answer: (B)

Explanation

With marginal propensity to consume $b$ and marginal propensity to import $g$, the foreign trade multiplier is $\frac{1}{1-b+g}$. The version containing $t$ describes an economy with proportional taxes.

61. What does a government budget describe?

A. Planned government revenues and expenditures for a fiscal year

B. Actual revenue differences that determine a surplus or deficit

C. Central bank lending and money creation during a fiscal year

D. Private household income and spending over a fiscal year

Answer: (A)

Explanation

A government budget is a financial statement of planned revenues and expenditures, generally for one fiscal year. A surplus or deficit instead compares revenues with expenditures, typically as an outcome rather than the budget’s basic definition.

62. Which situation represents a government budget surplus?

A. Tax and other revenues exceed government expenditures

B. Government expenditures exceed tax and other revenues

C. Tax collections fall while government spending rises

D. Planned expenditures equal the government’s expected revenues

Answer: (A)

Explanation

A surplus occurs when government revenues are greater than government expenditures. When expenditures exceed tax collections, the government instead has a budget deficit.

63. How do automatic stabilizers typically affect the government budget over the business cycle?

A. They promote a surplus in recession and a deficit during an inflationary boom

B. They promote a deficit in recession and a surplus during an inflationary boom

C. They require new legislation before changing taxes or government spending

D. They keep tax revenue and government spending fixed across the business cycle

Answer: (B)

Explanation

Automatic stabilizers respond without new legislation, reducing revenue or increasing spending in recessions and doing the reverse during booms. The opposite pattern would amplify rather than moderate cyclical conditions.

64. Which policy action is an example of discretionary fiscal policy?

A. Deliberately changing tax laws to alter government revenue

B. Accepting a cyclical budget balance without changing legislation

C. Allowing benefit payments to rise as unemployment increases

D. Allowing tax receipts to decline automatically during a recession

Answer: (A)

Explanation

Discretionary fiscal policy involves a deliberate change in laws or appropriation levels to alter revenues or expenditures. Automatic changes in taxes or spending caused by economic conditions are automatic stabilizers instead.

65. What distinguishes money from barter?

A. Money is generally accepted as a medium of exchange

B. Money exchanges one good directly for another

C. Money prevents goods and services from being priced

D. Money requires each trader to want the other trader’s good

Answer: (A)

Explanation

Money functions as a generally accepted medium of exchange and helps settle debts. Directly exchanging one good for another is the defining feature of barter, not money.

66. What occurs in a barter economy?

A. One good is exchanged directly for another without money

B. Prices are expressed using a common monetary unit

C. Goods are traded through a generally accepted medium of exchange

D. Debts are settled with a legally recognized currency

Answer: (A)

Explanation

Barter involves direct exchange between goods without using money. A generally accepted medium of exchange and a common price unit characterize a money economy instead.

67. Which problem is a major disadvantage of barter?

A. A monetary unit makes prices difficult to compare across goods

B. Physical goods provide an easy way to store generalized purchasing power

C. A generally accepted medium makes credit transactions impractical

D. A trade requires a double coincidence of needs between participants

Answer: (D)

Explanation

Barter requires each participant to possess something the other wants, creating the problem of a double coincidence of needs. Money reduces this difficulty by serving as a generally accepted medium of exchange.

68. Which statement correctly distinguishes commodity money from fiat money?

A. Commodity money has nonmonetary value, whereas fiat money has little commodity value

B. Commodity money has little commodity value, whereas fiat money is valued as gold

C. Commodity money settles debts by tradition, whereas fiat money must be exchanged directly

D. Commodity money depends on legal status, whereas fiat money has use value as tobacco

Answer: (A)

Explanation

Commodity money has value apart from its monetary use, while fiat money has little commodity value and is accepted through law or tradition. Gold and tobacco can serve as examples of commodity money, whereas ordinary currency commonly represents fiat money.