Which of the following insurance practices attempts to minimize the adverse selection problem insurance companies face?

Some cities finance their airports with a departure tax: every person leaving the city by plane is charged a small fixed dollar amount that is used to help pay for building and running the airport. The departure tax follows the:

a. benefits-received principle. b. ability-to-pay principle. c. flat-rate taxation principle. d. public-choice principle.

Movements up along a particular short run Phillips curve are not consistent with: a. Increases in aggregate demand

b. Movements up along the short run aggregate supply curve. c. Shifting inflationary expectations. d. Movements up along a particular short run Phillips curve are consistent with all of the above.