The dates of the "official" peaks and troughs of business cycles in the United States are determined by the:

The Chicago Board of Trade promotes liquidity in the futures market by

A) setting prices. B) establishing a price floor. C) allowing the short or the long to renegotiate contract terms. D) standardizing contract terms.

Suppose duopolists face the market inverse demand curve P = 100 - Q, Q = q1 + q2, and both firms have a constant marginal cost of 10 and no fixed costs. If firm 1 is a Stackelberg leader and firm 2's best response function is q2 = (100 - q1)/2, at the Nash-Stackelberg equilibrium firm 1's profit is

A) 400. B) 650. C) 800. D) 1200.