midI10fas - Your name: Econ 420K Midterm Exam I Fall 2010...

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Unformatted text preview: Your name: Econ 420K Midterm Exam I Fall 2010 Svetlana Boyarchenko Please read all the questions carefully. You have 75 minutes for this test. You can earn a total of 75 points on the test. The number of points assigned to each question roughly indicates the number of minutes which is reasonable to spend on each question. Dont be stuck on a question!! Its better to move on and then return if time permits. There are also a bonus question that gives to the intrepid extra 10 points. You must show all your work to get full credit. Partial credit will be given at my discretion, and it is non-negotiable. Solutions Alice enjoys goods x and y according to the utility function u ( x,y ) = xy. (1) (5 points) Find Alices marginal rate of substitution at the point (3 , 6). To find Alices MRS, we need, first, to calculate the marginal util- ities of goods x and y : MU 1 ( x,y ) = u ( x,y ) x = y ; MU 2 ( x,y ) = u ( x,y ) y = x....
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midI10fas - Your name: Econ 420K Midterm Exam I Fall 2010...

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