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Introduction 18/04/20132 One important problem in business is to determine the effect on revenue of a change in the price of a good. If the firm lowers the price then it will receive less for each item, but the number of items sold increases. The crucial factor here is not the absolute changes in P and Q but rather the proportional or percentage changes.

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Types of Elasticity 18/04/20133 If the percentage rise in Q is greater than the percentage fall in P then the firm experiences an increase in revenue. Under these circumstances we say that demand is elastic. Demand is said to be inelastic if demand is relatively insensitive to price changes. In this case, the percentage change in quantity is less than the percentage change in price. If the percentage changes in price and quantity are equal, leaving revenue unchanged. We use the term unit elastic to describe this situation.

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Price elasticity of demand 18/04/20134

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Rumus Elastisitas 18/04/20135

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Next 18/04/20136

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Example 18/04/20137

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Price elasticity of supply 18/04/201318

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Example 18/04/201319

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Latihan Soal 18/04/ Find the price elasticity of demand at P = 6 for each of the following demand functions

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Latihan Soal (2) 18/04/ Consider the supply equation

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Stop!! 18/04/ Minggu depan bisa dibaca: “Optimization of economic functions”

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