The market in which banks borrow from other banks for short periods of time is the

Since 1960, the labor force participation rate in the United States

A) at first rose sharply and then gradually decreased. B) has generally increased. C) has remained remarkably stable. D) has generally decrease. E) at first gradually decreased and in recent years has risen sharply.

In the short run, a perfectly competitive firm's most profitable level of output is where:

a. total revenue minus total cost is at a maximum. b. marginal cost equals marginal revenue. c. Both of the above. d. Neither of the above.