Price Elasticity in Terms of the Inverse Demand Function
The price elasticity of demand (ε) can be calculated using the inverse demand function, . The formula is given by , which can also be written as , where is the derivative of the inverse demand function. This formulation allows for the calculation of elasticity based on the inverse demand function. For a more detailed explanation of inverse functions and the inverse function rule, see Section 7.4 of 'Mathematics for Economists: An Introductory Textbook' by Malcolm Pemberton and Nicholas Rau (4th ed., 2015 or 5th ed., 2023).
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