In the above figure, the indifference curves indicate that the two goods are

An explicit cost is:

A. omitted when accounting profits are calculated. B. an implicit cost to the resource owner who receives that payment. C. always in excess of a resource's opportunity cost. D. a money payment made for resources not owned by the firm itself.

In the Keynesian framework, most short-run fluctuations in GDP are due to:

a. changes in aggregate demand b. changes in the natural rate of unemployment c. changes in potential GDP d. changes in the unemployment insurance system