Externalities can be positive, as well as negative.

In the above table, the working age population is

A) 225 million. B) 100 million. C) 140 million. D) 155 million.

According to liquidity preference theory, the money-supply curve would shift rightward

a. if the money demand curve shifted right. b. if the Federal Reserve chose to increase the money supply. c. if the interest rate increased. d. All of the above are correct.