Mutual funds that invest only in companies that meet certain criteria and usually exclude companies that produce tobacco, weapons, or alcoholic beverages are known as:

In the circular flow model, households

A) spend earnings from resource sales on goods and services in the product market. B) and firms spend earnings from resource sales on goods and services in the factor market. C) sell goods and services in the input market. D) hire resources sold by firms in the factor market.

Consider an oligopoly that has two firms, one with a 75 percent market share and the other with a 25 percent market share. The Herfindahl index for this market is:

a. 5,625. b. 6,250. c. 625. d. 5,000. e. 8,500.