Approximately how much of aggregate national income in the United States is spent on health care today?

From the point of view of economic efficiency, output in a monopolized market is

a. too high. b. perfect. c. too low. d. undesirable.

The minimum value of the Herfindahl-Hirschman Index (HHI) is ________ and the maximum value is ________.

A) 0; 10,000 B) 100; 1,000 C) 100; 10,000 D) 1; 1,000