Which of the following antebellum transportation innovations earned the greatest rate of return?

Suppose that Mexico and Canada both peg their currencies to the U.S. dollar. The relationship between the Mexican peso and the Canadian dollar is best described as a(n):

A) indirect peg. B) fixed exchange rate system. C) currency union. D) free trade area.

Sometimes what we think is a collective consumption good only has those characteristics because of _____

a. high fixed costs. b. private production c. economies of scale d. government production