Positive economics is a method of inquiry that attempts to explain the observable, and is limited to verifiable statements, while normative economics suggests a course of action that we should take based on a particular set of values and preferences

Developing countries often justify imposition of tariffs because:

a. it creates a burden on government budget. b. it is easy to collect direct taxes from people in the developing countries. c. a large number of people in the developing countries earn a taxable income. d. developing countries find income taxes difficult to levy and collect. e. the volume of imports of these countries is considerably low.

Congress relies on economists at the Congressional Budget Office to

a. enforce the nation's antitrust laws. b. set the nation's monetary policy. c. provide evidence that incumbent members of Congress are performing well in their jobs. d. provide independent evaluations of policy proposals.