The U.S. antitrust enforcers determine whether a merger violates antitrust laws by examining
A) both the resulting change in the HHI and the level of post-merger HHI.
B) only the resulting change in the HHI but not the level of HHI after the merger.
C) both the size of the market after the merger and the profits of the mergers.
D) whether the mergers are monopolies before they merge.
Answer: A
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Which of the following best describes the market reaction if a city restricts the number of firms that are allowed to operate in a market?
A) The market supply curve shifts to the left. B) The market demand curve shifts to the left. C) Quantity supplied increases because price increases. D) Price decreases.
According to the representative heuristic, people's belief about the likelihood that something belongs to a given category ________ the extent to which it shares characteristics with the stereotypical members of that category.
A. will only rarely be influenced by B. increases with C. is unaffected by D. decreases with
Refer to the short-run information provided in Figure 8.5 below to answer the question(s) that follow. 
Figure 8.5 Refer to Figure 8.5. If four drones are produced, average variable costs are
A. $5. B. $10. C. $17.50. D. $25.
The aggregate demand curve shifts when any of the following factors change EXCEPT
A) monetary policy. B) fiscal policy. C) the price level. D) expectations about the future. E) foreign income.