All individuals and firms in a country must gain from trade in order for it to be beneficial to the nation

The government's policy of reducing payments for physicians' services has generated a relative

A) increase in the number of physicians in the program. B) reduction in the number of physicians in the program. C) reduction in the demand for medical services. D) increase in the income of the physicians remaining in the program.

A movement along a demand curve from one price-quantity combination to another is called a:

A. change in quantity demanded. B. change in demand. C. shift in the demand curve. D. change in quantity supplied.