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An Example to Illustrate Utility Maximization, Profit Maximization, and Market Equilibrium
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Game Theory
An Example to Illustrate Utility Maximization, Profit Maximization, and Market Equilibrium
Holly is a typical college student living in Chico, California. She attends classes during the day and works as a waitress at the local vegetarian restaurant in the evenings. The pay is good, but tuition, room, and board are expensive; after paying all of her other bills, she only has about $200 per month to allocate between clothes and recreation. Holly’s favorite pastime is going to the movie theatre. After paying for her ticket and a small serving of popcorn, it usually costs her about $12 to see a movie. In Chico, it’s still popular to be a Grateful Dead fan, and Angie’s Ty-Dy Shop is the best place in town to buy the band’s official line of clothing. After looking through her closet, Holly decides that she needs to buy a few more shirts. In order to keep prices reasonable for their fans, the band requires that all stores charge the same price for their products. After checking out prices on the band’s website, Holly finds that her style of shirt costs $8 each. The real question for Holly is how many shirts to buy? With such reasonable prices, she can afford to buy more than one, but the Ty- Dy’s selection and availability may limit her choices. On the other hand, Angie really enjoys carrying the Dead’s clothing line, but her livelihood depends on the store turning a profit. With fixed prices, inventory control is crucial to maintaining profitability. While Angie strives to meet her customers’ needs (and she believes that Holly is a pretty typical customer), she also does not want to hold inventory that doesn’t sell, because that drives up her costs. Suppose that the following normal form game represents the decision process faced by Holly and Angie. Each has an option to buy and/or sell four, six, or eight shirts. Holly’s payoffs JOURNAL FOR ECONOMIC EDUCATORS • Volume 6 • Number 1 • Summer 2006 9 represent her net benefits (measured in numerical form) from buying a particular quantity of shirts, while Angie’s payoffs represent her net monetary gain from selling a particular quantity of shirts. Based on this information, how many shirts should Holly buy, and how many shirts should Angie sell? Angie Sell 4 Shirts Sell 6 Shirts Sell 8 Shirts Buy 4 Shirts (125.05; 15.01) (137.94; -4.74) (150.83; -32.00) Holly Buy 6 Shirts (112.16; 15.01) (132.06; 11.26) (144.95; -16.00) Buy 8 Shirts ( 99.27; 15.01) (119.17; 11.26) (127.31; 0.00) Download 150.53 Kb. Do'stlaringiz bilan baham: |
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