The duration of unemployment is not a leading indicator

Which of the following is NOT a function of rental prices?

A) to stimulate the construction of new housing B) to ration the existing housing stock C) to provide housing to individuals below market value D) to allocate existing scarce housing among different people

The practice of tying is illegal on the grounds that

a. it allows firms to expand their market power. b. it allows firms to form collusive arrangements. c. it prevents firms from forming collusive agreements. d. the Sherman Act explicitly prohibited such agreements.