Historical note: Because of its military importance, the U.S. government exercised monopoly control over which one of the following goods before World War II?

The indifference curve in the above diagram yields Juan 100 units of utility. If Juan's money income were to increase by 20 percent, the indifference curve would:

A) shift leftward. B) shift rightward. C) become steeper. D) not be affected.

The new growth theory's comparison of the economy to a perpetual motion machine implies that

A) overpopulation will eventually overtake the resources of the planet. B) technology changes just happen. C) permanent growth is not possible. D) the economy will forever create and destroy jobs. E) labor productivity has no influence on the economy.