If Microsoft merges with retail stores and computer makers, such that competition is substantially reduced, it would be in violation of the:

If the Habakkuk thesis had been correct—unamended by Rosenberg, David and others—a long-run decline in the supply of agricultural productivity west of the Appalachians would be matched by a proportional

(a) decline in the productivity growth in eastern manufacturing. (b) increase in productivity in eastern manufacturing. (c) rise in American food imports. (d) rise in American exports of manufacturing.

Economic rents are useful because

A) they increase the income of the owner. B) they make it easy to calculate opportunity cost. C) resources will go to their most efficient use. D) they increase tax revenue.