In the 1950s, about _________ of U.S. workers were in unions.

Comparing the aggregate supply curve and the short-run Phillips curve, we see that they

A) both exist because real wage rate is fixed in the short run. B) both exist since money wages are flexible. C) each describe different parts of the economy. D) describe the same phenomena but contradict each other. E) both exist because money wage rate is fixed in the short run.

Refer to Table 4-6. The table above lists the marginal cost of polo shirts by Marko's, a firm that specializes in producing men's clothing. If the price of polo shirts increases from $15 to $20

A) the marginal cost of producing the third polo shirt will increase to $20. B) there will be a surplus of polo shirts. C) producer surplus will rise from $13 to $28. D) consumers will buy no polo shirts.