4: Normative vs. Positive (The Wide Scope of Economics)
6: Marginal Rate of Substitution and Marginal Utility
6A: Marginal Rate of Substitution and Marginal Utility
7: Budget Constraints and Utility Maximization
8: An Example of Indifference Curve Analysis
11A: The Slutsky Equation and Demand Curves
12: Diminishing M U Doesn't Mean Down Sloping demand