If the supply of money increases, the long-run aggregate supply curve suggests that output will not change but the price level will

The increasing popularity of hotdogs in a food joint has pushed up their price, making it unaffordable for many students living in the surrounding areas. This is an example of a ________

A) positive externality B) negative externality C) pecuniary externality D) free-rider problem

Drawing conclusions from international comparisons of GDP are difficult to assess because

A) GDP is understated in poorer countries because much of the work that people do is not provided in markets. B) GDP cannot be adequately evaluated as a measure of people's welfare or well-being. C) without adjusting for purchasing power parity, GDP comparisons might very well be meaningless. D) all the above reasons hold true.