Understanding how demand for a product might change as price changes is essential to an effective marketing strategy. First, a quick acronym - price elasticity of demand is often to just "PED": much quicker to write, particularly in an exam, so we'll use it here. PED measures the responsiveness of demand for a product following a change in its own price . The formula for calculating the co-efficient of elasticity of demand is: Percentage change in quantity demanded divided by the percentage change in price Since changes in price and quantity usually move in opposite directions, we usually do not bother to put in the minus sign. We are more concerned with the co-efficient of elasticity of demand [however, in the exam be precise and use the minus sign]. By calculating Ped, a business can assess how a change in price will affect the demand for its products. This is really useful information for any marketing plan, but also h...
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