A service like CARFAX, which provides a used car buyer with the complete history of a used car, is profitable because of the problem of asymmetric information

Suppose market demand is p = 10 - Q. Firms have a fixed entry cost of 5 and no marginal cost. If firm A is the incumbent, can it deter the entry of its rival, firm B?

What will be an ideal response?

In a monopolistically competitive market,

a. entry by new firms is impeded by barriers to entry; thus, the number of firms in the market is never ideal. b. entry by new firms is impeded by barriers to entry, but the number of firms in the market is nevertheless always ideal. c. free entry ensures that the number of firms in the market is ideal. d. there may be too few or too many firms in the market, despite free entry.