In a perfectly competitive market, firms are not restricted from entering or leaving an industry in response to profits or losses

A countercyclical variable ________

A) moves up during expansions and down during contractions B) is another term for an acyclical variable C) moves in the same direction as aggregate economic activity D) all of the above E) none of the above

All of the following are considered intellectual property except

A) books. B) films. C) software. D) shares of stock.