Measures of the prices of groups of stocks, such as the Dow Jones Industrial Average and the S&P 500, are called

If there is a favorable supply shock which direction does the short-run Phillips curve shift? What initially happens to unemployment and inflation as a result of this shock?

For a firm in a perfectly competitive market, if it is producing at a level of output where marginal costs are less than marginal revenue it:

A. is producing a profit-maximizing quantity. B. should invest more in advertising in order to raise revenues. C. should cut back production to increase profits. D. should increase production to increase profits.