The store of value does not require that money hold its value of time in terms of its purchasing power

The optimal Pigouvian tax is equal to the marginal social:

a. benefit of pollution at the market-determined level of pollution. b. cost of pollution at the market-determined level of pollution. c. benefit when there is zero pollution. d. cost of pollution at the socially optimal quantity of pollution.

The existence of internal economies of scale

A) cannot be associated with a perfectly competitive industry. B) may be associated with a perfectly competitive industry. C) is associated only with sophisticated products such as aircraft. D) cannot form the basis for international trade. E) focuses more on the industry than individual firms.