Suppose purchasing power parity holds. If the price level in the United States is 100 dollars per good and the price level in Japan is 250 yen per good, then the nominal exchange rate is ________ yen per dollar

To achieve allocative efficiency, one must compare the

A) marginal cost of a good to its opportunity cost. B) opportunity cost to the attainable point on the production possibilities frontier. C) marginal benefit of a good to its marginal cost. D) marginal cost to the production efficiency cost. E) point of production efficiency to the point of allocative efficiency.

What was the GATT, why was it established, and why and with what was it replaced?

What will be an ideal response?