No country can have an absolute advantage in the production of more than one good

Over the past fifty years, there has been substantial closure of the gap in real GDP per person between which of the following groups of countries?

A) the United States and Central and South America B) Africa and Western Europe C) Central and South America and Africa D) the United States and Japan

When the economy is in short-run equilibrium, there will be ________ output gap.

A. only a recessionary B. no C. either a recessionary or an expansionary D. only an expansionary