________ purchasing power parity states that the difference between changes over time in product-price levels in two countries will be offset by the change in the exchange rate over this time.

From the 1970s through the 1990s, the relative price of a college education has increased greatly. During the same time period, college enrollment has also increased. This evidence suggests that during this time period

A) the demand curve for a college education has shifted leftward. B) the demand curve for a college education has shifted rightward. C) the supply curve for a college education has shifted leftward. D) the supply curve for a college education has shifted rightward.

Which of the following trade rounds was started in 2001 but has never been settled even in 2012 and whose goals were aimed at lowering tariffs on a wide range of industrial and agricultural products?

a. Uruguay b. Switzerland c. Doha d. All rounds have been completed.