The above figure shows supply and demand curves for milk. If the government passes a $2 per gallon specific tax, the tax revenue is

The market demand curve for labor

A) is the same as the market demand curve for the product labor produces because it is a derived demand. B) is determined by adding up the quantity of labor demanded by each firm at each wage, holding constant the other variables that affect the willingness of firms to hire workers. C) is perfectly inelastic because there is a finite number of workers in the market for labor. D) is determined by adding up the demand for labor by each firm at each wage, holding constant the other variables that affect the willingness of firms to hire workers.

A study of American economic history excludes a study of which of the following?

(a) Historical demography (b) The love affairs and private relationships of U.S. presidents (c) Development of market rules and regulations (d) Development of government intervention in market affairs