Empirical evidence shows that the short-run Phillips curve was vertical during the 1950s and 1960s

In perfect competition, marginal revenue

A) increases as more is sold. B) decreases as more is sold. C) is equal to the market price. D) is zero. E) is always greater than marginal cost.

Government provides secondary education because of its private good aspects.

Answer the following statement true (T) or false (F)