In a perfectly competitive market, the type of decision a firm has to make is different in the short run than in the long run. Which of the following is an example of a perfectly competitive firm's short-run decision?
A) the profit-maximizing level of output
B) how much to spend on advertising and sales promotion
C) what price to charge buyers for the product
D) whether or not to enter or exit an industry
E) whether or not to change its plant size
A
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Suppose the demand for rescue services in our national parks is perfectly inelastic. This fact would mean that a 31 percent increase in rescue fees leads to
A) a 31 percent decrease in the quantity demanded. B) a 31 percent increase in demand. C) a 31 percent decrease in demand. D) no change in the quantity demanded. E) a decrease in the quantity demanded to 0 rescues.
Sue consumes only sandwiches and soda and is at her best affordable point. The price of a sandwich falls. The substitution effect is that Sue substitutes ________ for ________. The income effect is that Sue ________
A) sandwiches; soda; buys less of both goods B) soda; sandwiches; buys more soda and fewer sandwiches C) sandwiches; soda; buys more of both goods D) soda; sandwiches; buys less soda and more sandwiches