Question 1: Which of the following provides the most effective illustration of marginal analysis?

• estimating potential sales for a new product
• comparing the costs and benefits of a proposed investment (Correct answer)
• forecasting likely changes in major economic trends
• determining the fixed costs for a new production facility

Correct answer: comparing the costs and benefits of a proposed investment

Marginal analysis weighs the additional (incremental) costs of a decision against its additional benefits, which is exactly what comparing the costs and benefits of a proposed investment does. Estimating sales, forecasting trends, or determining fixed costs do not involve evaluating incremental change at the margin.

Question 2: Two pharma firms that are each separately owned come to an agreement to combine their operations. However, in order to make sure that the merger does not break antitrust rules, the merger must first have government approval. <br> <br> This scenario most likely took place in which of the following types of economic systems?

• command economic system
• pure market economic system
• mixed-market economic system (Correct answer)
• traditional economic system

Correct answer: mixed-market economic system

A contraction begins right after the economy's peak, so the best signal is an indicator pointing to overheating that is just about to turn — a rise in commodity prices reflects the peak input-cost pressure that precedes the downturn rather than an established decline. Falling inventories and longer delivery times typically indicate continued strong demand, while a shorter average workweek reflects an already-underway slowdown (a recession signal).

Question 3: Which of the following theories best explains how the fundamental economic tenet that free trade generates prosperity works?

• specialization (Correct answer)
• economies of scale
• capital mobility
• marginal efficiency of capital

Correct answer: specialization

A reduction in the average workweek is the clearest early sign a recession has begun, because employers cut workers' hours before resorting to layoffs as demand falls. Rising commodity prices, longer delivery times, and declining inventories more often reflect strong or expanding activity, not the onset of contraction.

Question 4: Which of the following would be initially affected by government aircraft purchases?

• Payment for Goods and Services (Correct answer)
• Goods and Services
• Land, Labor, Capital
• Rent, Wages, Interest

Correct answer: Payment for Goods and Services

In the circular-flow model, government aircraft purchases enter as Payment for Goods and Services—the money flow going to the product market. Goods and Services and Land, Labor, Capital are the real (non-money) flows, and Rent, Wages, Interest are factor-market payments, none of which is the direct payment for the aircraft.

Question 5: As a gauge of a country's economic success, the gross domestic product (GDP) has the following significant limitations:

• overseas transactions.
• nonmarket activities. (Correct answer)
• inventory investment.
• government purchases.

Correct answer: nonmarket activities.

GDP only counts officially traded, market transactions, so it omits nonmarket activities such as unpaid household work, volunteer labor, and do-it-yourself production. Overseas transactions, inventory investment, and government purchases are all already captured in GDP.

Question 6: Which of the following better denotes the start of a business cycle's contraction phase for the economy?

• an increase in the time required to make deliveries
• a decline in business inventories
• a reduction in the length of the average workweek
• a rise in commodity prices

The start of a contraction is signaled by leading indicators that slow before the rest of the economy reacts, and a shortening of the average manufacturing workweek is the classic early warning because employers cut hours before they cut output, inventories, or prices. Lengthening delivery times and rising commodity prices typically accompany a strong or peaking economy, and declining inventories usually reflect a downturn already underway rather than its onset.

Question 7: Which of the following is the best sign that a business cycle's recession phase has begun for the economy?

• an increase in the time required to make deliveries
• a decline in business inventories
• a reduction in the length of the average workweek (Correct answer)
• a rise in commodity prices

Correct answer: a reduction in the length of the average workweek

A recession reflects falling demand for output and labor, and shortening the average workweek is the most direct early signal because employers reduce hours before laying workers off. Rising commodity prices, longer delivery times, and falling inventories generally indicate strong or expanding activity rather than the start of a downturn.