If actual investment is greater than planned investment, unplanned inventories decline.

According to Professors Cowen and Tabarrok, the most efficient gift is:

A. charitable donations made in someone's name. B. cash. C. paternalistic gifts like mittens. D. books on economics.

When is it not necessary to build a new market supply schedule?

(A) When new technology is used to produce a good. (B) When there is a change in input costs. (C) When there is a change in the number of suppliers. (D) When there is a change in the price of a good.