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In the standard form of the Constant Elasticity of Substitution (CES) production function with two inputs, \(Q = A\left[aK^{-\theta} + (1-a)L^{-\theta}\right]^{-1/\theta}\), “A” is the:

  • A.Scale parameter
  • B.Distribution parameter
  • C.Efficiency parameter
  • D.Substitution parameter

Answer: C

In the CES production function the parameter A is the efficiency parameter, which measures the level of technology: a larger A gives more output from the same inputs. The parameter a is the distribution parameter, which fixes the share of the two factors, and theta is the substitution parameter, from which the elasticity of substitution is derived. The scale of production is governed by a separate degree of homogeneity in the general form. The answer is the efficiency parameter, option C.

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