A legal minimum on the price at which a good can be sold is called a price

Which of the following statements is true about the economy in the long run?

a. Equilibrium output is below potential GDP and the rate of unemployment exceeds the natural rate. b. Production costs are close to zero in the long run. c. The rate of unemployment is zero in the long run. d. The aggregate demand curve plays no role in determining the equilibrium level of real GDP. e. The aggregate supply curve is a horizontal line.

Which one of the following economists has played a central role in the development of the "economics of collective decision making," better known as public choice analysis?

a. Alfred Marshall b. John Maynard Keynes c. James Buchanan d. Milton Friedman