Which of the Following Has Been Confirmed by Empirical Tests

Multiple Choice

Which of the following has been confirmed by empirical tests of the Ricardian model?

A) The unimportance of economies of scale as a cause of trade.
B) Companies tend to export goods in which they have a relatively high level of productivity.
C) The existence of nontraded goods results in a high degree of specialization among countries.
D) International trade has no impact on income distribution.
E) All predictions of the model for a multi- product,multi- country world are highly unrealistic.