In a perfectly competitive market, when the price is below the minimum average total cost for all firms:
A. economic profits will be equal to zero.
B. the price will eventually rise once enough firms have left the market.
C. firms will likely enter the market.
D. accounting profits will be positive.
Answer: B
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A shift in the demand curve will occur when
A. suppliers place more goods on the market. B. the price of a good rises. C. consumers want to buy more or less than before at a given price. D. the price of the good falls.
Agnes can produce either 1 unit of X or 1 unit of Y in an hour, while Brenda can produce either 2 units of X or 4 units of Y in an hour. The opportunity cost of producing a unit of X is
A) 1 unit of Y per unit of X for Agnes and 2 units of Y per unit of X for Brenda. B) 1 unit of Y per unit of X for Agnes and 1/2 unit of Y per unit of X for Brenda. C) 1 hour for Agnes and 1/2 hour for Brenda. D) 1 hour for Agnes and 2 hours for Brenda.
Rational expectations are more accurate than adaptive expectations, ________
A) on average B) always C) because they require less information D) except when policies have changed
If people buy less chewing gum at every price when their incomes fall, then:
a. chewing gum is a normal good. b. the demand for chewing gum is positively sloped. c. demand for chewing gum has increased. d. the price of chewing gum has increased. e. there has been a decrease in population that changed demand.