The used car market without warranties suffers from
A) perfect competition.
B) oligopoly.
C) adverse selection and moral hazard.
D) excessive signaling.
C
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A positive externality is shown by a marginal social benefit (MSB) curve that is
A) above and to the right of the demand curve for the good that generates it. B) below and to the left of the demand curve for the good that generates it. C) above and to the left of the supply curve for the good that generates it. D) below and to the right of the supply curve for the good that generates it. E) positively related to both the supply curve and the demand curve for the good that generates it.
A situation in which a market economy leads to too few or too many resources going to a particular economic activity is known as
A) competition. B) excessive competition. C) destructive competition. D) a market failure.