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Outline for Monday, July 21
 Remember
   Quiz tomorrow
   Homework due Friday
 Review Friday – finding the optimum
 Questions about the hw or quiz?
 Cobb-Douglas functions
 ICC and PCC interpretation
Finding the optimum (X*,Y*)
 There are two unknowns, so we need two equations
Finding the optimum (X*,Y*)
 There are two unknowns, so we need two equations
 You should know how to solve…
     Typical case       Expenditure = Income      Slopes match

  Perfect substitutes   Expenditure = Income       Buy X OR Y

 Perfect complements    Expenditure = Income   Buy X and Y together
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July21

  • 1. Outline for Monday, July 21 Remember Quiz tomorrow Homework due Friday Review Friday – finding the optimum Questions about the hw or quiz? Cobb-Douglas functions ICC and PCC interpretation
  • 2. Finding the optimum (X*,Y*) There are two unknowns, so we need two equations
  • 3. Finding the optimum (X*,Y*) There are two unknowns, so we need two equations You should know how to solve… Typical case Expenditure = Income Slopes match Perfect substitutes Expenditure = Income Buy X OR Y Perfect complements Expenditure = Income Buy X and Y together