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      Question

      Who introduced the concept of elasticity of demand?

      A Boulding Correct Answer Incorrect Answer
      B Marshall Correct Answer Incorrect Answer
      C Robinson Correct Answer Incorrect Answer
      D Joel Dean Correct Answer Incorrect Answer

      Solution

      Joan Robinson has said – β€œThe Elasticity of Demand at any price or at any output, is the proportional change of amount purchased in response to a small change in price, divided by the proportional change in price

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