Which of the following is not a determinant of an individual's marginal product?

Having one central bank responsible for managing the common currency and replacing the national monetary authority provides benefits that include all of the following, EXCEPT:

A) independence and the ability to resist political pressure. B) better performance in keeping inflation stable with no large swings in unemployment. C) the ability to tailor the supply of money for a variety of economic conditions in the member states. D) provision of a stable nominal anchor.

How does the expenditure multiplier change when investment spending increases?

a. It increases. b. It decreases. c. It does not change. d. It briefly increase before returning to equilibrium.