When marginal revenue is zero for a monopolist facing a downward-sloping straight-line demand curve, the price elasticity of demand is:

During the 1990s, food production increased faster than population in all regions of the developing world except

(a) Latin America. (b) East Asia. (c) Sub-Saharan Africa. (d) none of the above.

Suppose that there is concern about the stability of the global financial system causing a flight to the safety of U.S. government bonds. Which of the following is NOT a likely consequence?

A) higher price of U.S. government bonds B) lower interest rate on U.S. government bonds C) increased demand for U.S. government bonds D) reduced supply of U.S. government bonds