A nation's average annual real GDP growth rate is 2.5%. Based on the rule of 70 the approximate number of years that it would take for this nation's real GDP to double is:

A good way to encourage agricultural production is to

a. encourage farmers to work harder b. subsidize input prices for farmers c. permit farm prices to rise with increasing demand d. create a monopoly firm to buy all farm output e. all of the above

The Heckscher-Ohlin model differs from the Ricardian model of Comparative Advantage in that the former

A) has only two countries. B) has only two products. C) has two factors of production. D) has two production possibility frontiers (one for each country). E) has varying wage rates.