It pays the firm to produce only if total variable costs exceed total revenue.

If the geography hypothesis holds, then:

A) poorer countries are permanently disadvantaged. B) living standards in poorer countries can be substantially improved. C) poorer countries are likely to catch up with richer countries very fast. D) cultural beliefs can be considered to be an important source of economic prosperity.

The state of Georgia offers free college tuition to high school students with a "B" average. In 2007, the state raised the requirement so that fewer students qualified for the scholarship

At the same time, Georgia increased state spending on health care. Suppose that college education is on the vertical axis and health care is on the horizontal axis of a PPF. These changes A) are example of a tradeoff. B) are an example of incentives. C) will cause a shift out of the PPF. D) will cause a shift in the of the PPF.