1. Let's use the Euler equation two ways. First, to find out the optimal consump- tion path, taking the interest rate as given (Chapter 9 of GLS) and then to find out the equilibrium interest rate that wil Choose sidebar display for saving and investment, taking the consumption path as given (Chapter 11 of GLS). Both times, the utility function will be the same: Uln(c)+0.9ln(+1) So the future counts 90% as much as the present. In Part 1, income each period is 100, and the interest rate is 20%. In Part 2, consumption in each period is 100-in other words, income each period is 100, but income isn't storable (it's "manna"), so you have to consume it or lose it. Answer the following questions. Part 1: What is optimal consumption each period? In period t of this two- period world, will this person be borrowing or saving or neither? ⚫ Part 2: What is the equilibrium interest rate between these two periods? If the equilbrium interest rate were lower than that level, would that create a surplus or a shortage, in Econ 101 terms?

What are some reasons why the investment strategy of a 30-year-old might differ flow the investment strategy of a 65-year-old?