George and Brad are waiters at a local restaurant. The female customers think that George is better looking than Brad. If George earns more than Brad, this could be an example of each of the following except

Your aunt owns a gold mine. The marginal extraction cost of gold is $25 and remains constant over time. The current market price of a unit of gold is $200. Your aunt's appropriate discount rate is 12%

Next year, your aunt expects the price of a unit of gold to be $222. Should your aunt extract any gold from the mine this year?

Data from the effects of the substantial tax rate reductions in the 1980s

a. cast serious doubt on the Laffer curve as a guide for tax policy. b. are consistent with the principles illustrated in the Laffer curve. c. generally reject the idea that lower tax rates can lead to higher tax revenue. d. support an "inverted Laffer curve" in which reducing tax rates for those with high incomes leads to lower tax revenue.