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Microeconomic Tools. Supply and Demand. In microeconomics, we typically have suppliers reacting positively to price, and demanders reacting negatively. The two of them combine to provide an equilibrium , that indicates the market quantity and the market price. Demand for Apples. Price.
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Supply and Demand • In microeconomics, we typically have suppliers reacting positively to price, and demanders reacting negatively. • The two of them combine to provide an equilibrium, that indicates the market quantity and the market price.
Demand for Apples Price 10.00 7.50 5.00 2.50 100 200 300 400 500 Apples
What affects demand? • Price of the good • Prices of other goods • Consumer income • Tastes
Demand for Apples Price 10.00 Demand with higher income 7.50 5.00 2.50 100 200 300 400 500 Apples
Supply of Apples 10.00 7.50 5.00 2.50 100 200 300 400 500 Apples
What affects supply? • Technological change • Input prices • Prices of Production-Related Goods • Size of the Industry • Weather
Supply of Apples 10.00 Poor weather 7.50 Improved technology 5.00 2.50 100 200 300 400 500 Apples
Equilibrium of Demand and Supply Supply Demand 10.00 7.50 5.00 2.50 100 200 300 400 500 Apples
Equilibrium of Demand and Supply Supply Demand 10.00 7.50 Total Revenue, Total Expenditures 5.00 2.50 100 200 300 400 500 Apples
Equilibrium of Demand and Supply Shift in Demand Supply Demand 10.00 7.50 5.00 2.50 100 200 300 400 500 Apples
Equilibrium of Demand and Supply Supply Shift in Supply Demand 10.00 7.50 5.00 2.50 100 200 300 400 500 Apples
Equilibrium of Demand and Supply Shift in Demand Supply Shift in Supply Demand 10.00 7.50 5.00 2.50 100 200 300 400 500 Apples
Utility Analysis? • In principles courses we often measure utility -- sometimes use “utils” ... • which is dorky (most of the time). • For several analyses in health economics, we’ll want to use more modern analysis …, • although for insurance, we’ll go back to “utils” • Ordinal utility
Indifference Curves 100 75 Health Club Visits 50 25 20 40 60 80 100 Pounds of Spam
Indifference Curves 100 Higher level of utility 75 Health Club Visits 50 25 20 40 60 80 100 Pounds of Spam
How much is bought? In a month Visits = $20/visit Spam = $10/pound Income = $1500 100 75 Health Club Visits 50 25 If price of Spam doubles? 20 40 60 80 100 Pounds of Spam
Putting them together In a month Prescriptions = $20/visit Spam = $10/pound Income = $1500 100 75 Health Club Visits 50 25 20 40 60 80 100 Pounds of Spam
Putting them together In a month Visits = $20/visit Spam = $10/pound Income = $1500 U1 100 U2 75 Health Club Visits 50 25 20 40 60 80 100 Pounds of Spam
Putting them together In a month Visits = $15/visit Spam = $10/pound Income = $1500 100 U increases 75 Health Club Visits More visits 50 More Spam Why? 25 20 40 60 80 100 Pounds of Spam
A close look at the tangency In a month Visits = $20/visit Spam = $10/pound Income = $1500 100 U2 75 Health Club Visits -phDv 50 +psDs -DU/Dv = - Mgl. utility of visits DU/Ds = Mgl. utility of Spam 25 20 40 60 80 100 Pounds of Spam
A close look at the tangency In a month Visits = $20/visit Spam = $10/pound Income = $1500 -pvDv + psDs = 0 Dv/Ds = ps/pv 100 Now, for utility MUv/Mus = (DU/Dv)/(DU/Ds) U2 75 = Ds/Dv Health Club Visits ps/pv =Dv/Ds = MUs/Muv -phDv or 50 +psDs Muv /pv = MUs/ ps -DU/Dv = - Mgl. utility of visits DU/Ds = Mgl. utility of Spam 25 20 40 60 80 100 Pounds of Spam