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Definition of Unit Elasticity:
the elasticity of demand when it equals one. An increase in price will not result in a change in revenues because the increase in revenues from the sale of a good will be offset by a reduction in the quantity demanded.
The law of demand tells us that if the price of a good is increased, the quantity demanded of that good must decrease. For business managers, relevant questions are "What will happen to our revenues if we raise our price?". "Will the increase in price be offset by the drop in the number of items sold?" Every demand curve has a point of unit elasticity, where the elasticity of demand equals one. This is the point where a price change would not change total revenue. Any gain in revenue from increasing the price would be offset by the loss in revenue from the reduction in quantity demanded. In other words where the price elasticity is one, the percentage increase in price yields the same percentage decrease in the quantity demanded.
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Price Elasticity of Demand - How Consumers Respond to Price Changes
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