Which of the following is NOT a category in the U.S. balance of payments account?

Suppose Cournot duopolist firms operate with each having a cost of 30qi (i = 1,2 ) so that each firm's marginal cost is 30. The inverse market demand curve is P = 120 - Q where Q = q1 + q2. At the Nash-Cournot equilibrium, the market price, P, is

A) 30. B) 45. C) 60. D) 90.

The shape of a firm's long-run average cost curve is determined by:

a. the degree to which each input encounters diminishing marginal productivity. b. the underlying nature of the firm's production function when all inputs are able to be varied. c. how much the firm decides to produce. d. the way in which the firm's expansion path reacts to changes in the rental rate on capital.