The shape of the _____ curve determines the impact of an aggregate demand shift on prices and output.

The welfare cost of taxation is identical to the excess burden of taxation

a. True b. False

Rachel spends her income, Y, on Rock Shows (R) and Sunglasses (S) with prices pR and pS. Rachel's preferences are given by the Cobb-Douglas utility function

U(X,Y) = R.8S.2 a. Write out the Lagrangian for Rachel's utility-maximization problem. b. Use the Lagrangian to derive Rachel's optimal choice, (R*,S*). c. For a given utility level, U0, derive Rachel's Expenditure function E(pR,pS,U0). d. Use the Expenditure function to derive Rachel's compensated demand for Rock Shows.