1. Regulation is most likely to occur in a market characterized as

a. monopolistically competitive.
b. perfectly competitive.
c. oligopolistic.

2. Regulation is most likely to occur in a market with a Herfindahl–Hirschman Index (HHI) of

a. 100
b. 1000
c. 5
d. 2500

3. Regulation is more likely to occur in

a. broadly defined markets.
b. narrowly defined markets.