What are the three examples of controversial business practices that antitrust laws often prohibit?

In the open-economy macroeconomic model, the key determinant of net capital outflow is

a. the real exchange rate. When the real exchange rate rises, net capital outflow rises. b. the real exchange rate. When the real exchange rate rises, net capital outflow falls. c. the real interest rate. When the real interest rate rises, net capital outflow rises. d. the real interest rate. When the real interest rate rises, net capital outflow falls.

Which of the following is not correct?

a. In the short run, policymakers face a tradeoff between inflation and unemployment. b. Events that shift the long-run Phillips curve right shift the long-run aggregate supply curve left. c. Unemployment can be changed only by the use of government policy. d. The decrease in output associated with reducing inflation is less if the policy change is announced ahead of time and is credible.