Microeconomics 2nd Edition by Douglas Bernheim

Exercise 3

Julia and Frank consume hamburgers ( H ) and salads ( S ). Julia's utility function is U ( H , S ) = 4 H 0.3 S 0.9 , and Frank's is U ( H , S ) = H 0.1 S 0.3. They have the same income and face the same prices. How do their purchases of hamburgers and salads compare