The long-run aggregate supply curve is:
a. upward-sloping

A fall in the real interest rate, all other things held constant, will cause a country's ________ to ________

A) current consumption: increase B) current consumption: decrease C) terms of trade; improve D) terms of trade; worsen E) welfare level; improve

At the current price of a good, Al's consumer surplus equals eight, and Ben's consumer surplus equals 15. By charging a two-part tariff, a monopolist could increase his profit by

A) 8. B) 16. C) 15. D) 30.