Exhibit 8-3 Cost per unit curves
As shown in Exhibit 8-3, the price at which the firm earns zero economic profit in the short-run is:

When a tax is imposed on a good, at the after-tax equilibrium the marginal benefit of the last unit produced ________ the marginal cost

A) equals B) is greater than C) is less than D) can be calculated but is not comparable to E) The premise of the question is incorrect because after a tax is imposed, it becomes impossible to determine the marginal benefit and the marginal cost.

Which balance of payments measure shows best if a nation is paying its own way?

a. Trade balance b. Balance on goods, services, and income c. Reserves account. d. Net errors and omissions account e. Net transfers account