ECN 212 Lecture Notes - Lecture 9: Monopolistic Competition, Market Power, Marginal Revenue

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11 Apr 2018
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All diagrams come from patricia ramirez de la vina"s powerpoint competitive markets power point notes. An entrepreneur must determine a number of things. When to exit or enter a market. Market in which there are many buyers and many sellers so that each has a negligible impact on the market price. Goods offered for sale are largely the same. Firms can freely enter or exit the market. Each buyer and seller is a price taker - have to take the market price as given. Marginal revenue (mr) = price for a competitive firm. Change in total revenue from selling one more unit of output. Marginal revenue = change in total revenue divided by change in output = price. Total revenue (tr) = p x q. Average revenue (ar) = tr/q = p. Profit = marginal revenue (mr) - marginal cost (mc) When marginal revenue is greater than or equal to marginal cost, the firm is making a profit.

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