A good that is excludable is one that someone can be prevented from using if she did not pay for it

The argument that many critics of free trade have suggested that genetic engineering of plants and animals could lead to accidental production of new diseases is the

A) national security argument. B) infant industry argument. C) protecting domestic jobs argument. D) environmental and safety argument.

When free entry is one of the attributes of a market structure, economic profits are: a. generally driven to zero in long-run equilibrium. b. generally negative for all firms

c. generally zero in the short run. d. always positive.