If students' expenditures on airline travel increase as a consequence of more heavily discounted fares, students' demand for airline travel must be

Suppose the U.S. GDP growth rate is slower relative to other countries' GDP growth rates. This will

A) shift the aggregate demand curve to the left. B) move the economy down along a stationary aggregate demand curve. C) shift the aggregate demand curve to the right. D) move the economy up along a stationary aggregate demand curve.

In the late 1980s, the health benefits of oat bran were widely advertised. If the price of oats increased 50%, causing the quantity of oats supplied to increase by 40%, then the price elasticity of supply was

A) 1.25. B) -1.25. C) -0.80. D) 0.80.