In January 2013, the world's cheapest Big Macs were sold in

Which of the following statements is (are) correct? Critics of the real business cycle model

a. question whether technology has ever been the cause of a recession. b. do not deny that some technology shocks affect many industries. However, they do not believe that there are enough of these shocks to explain recessions where output falls too as much as 10 percent below potential output. c. argue that aggregate supply changes drive most business cycles. d. All of the above e. None of the above

Suppose a consumer has preferences over two goods, X and Y, which are perfect substitutes. In particular, two units of X is equivalent to one unit of Y. If the price of X is $1, the price of Y is $3, and the consumer has $30 of income to allocate to these two goods, how much of each good should the consumer purchase to maximize satisfaction?

a. 30 units of X and 0 units of Y b. 0 units of X and 10 units of Y c. 15 units of X and 5 units of Y d. 15 units of X and 0 units of Y