If compared against other criteria for evaluating the public interest, the social welfare function is most comparable to _____

Specialization and trade exploit differences in productivity across workers and

A) make everyone better off. B) only benefit the importer. C) make everyone worse off. D) only benefit the exporter.

With a human capital investment (such as the investment in going to college), the most important cost tends to be

A) foregone leisure. B) books and equipment. C) the opportunity cost of not working. D) taxes.