Problem
Consider the stationary equilibrium of the overlapping generation's model with commodity money. Assume the population is constant.
1. Characterize the equilibrium of the commodity money market and explain possible outcomes when the supply of commodity money doubles.
2. Explain why replacing commodity money with flat money is a Pareto improvement.
3. Explain why it is impossible for a growing economy to simultaneously have a constant money supply and constant nominal prices. Then discuss why maintaining constant prices in a growing economy is particularly difficult under a commodity money system.