If R2ur = 0.6873, R2r = 0.5377, number of restrictions = 3, and n- k- 1 = 229, F statistic equals:

For the short-run Phillips curve to remain relatively stable, then changes in real GDP must occur primarily as a result of shifts in: a. changes in aggregate demand

b. changes in real wages caused by changes in the supply of labor. c. changes in inflationary expectations. d. changes in aggregate supply.

Which of the following is an example of an externality?

a. A paper mill dumps waste into the river. b. A neighbor's loud music disrupts sleep. c. A drunk driver causes an accident that injures another person. d. All of the above are correct.