If the interest rate rises, then firms' investment spending:

A characteristic of monopolistic competition is

A) product differentiation. B) a high capital-output ratio. C) a low ratio of fixed costs to variable costs. D) the absence of advertising.

Over the past 50 years, the average real wage for males who do not have a college diploma has ________

A) fallen B) risen C) remained essentially unchanged D) risen in economic contractions and fallen in economic expansions