The free-rider problem arises because pure public goods are nonexcludable

In an inflationary environment, then over time

A) a specific tariff will tend to raise more revenue than an ad valorem tariff. B) an ad valorem tariff will tend to raise more revenue than a specific tariff. C) an optimum tariff will tend to raise more revenue than an escalating tariff. D) a tariff quota will tend to raise more revenue than a specific tariff. E) an import quota would raise more revenue than a specific tariff.

A positive economic statement is:

a. an opinion of an action that should be taken. b. an action that will have a positive effect on the economy. c. a statement testable by facts. d. a claim that the speaker is positive will occur. e. always a microeconomic position.