More pitfalls in the testing of duality theory / J.A. Breslaw, and J.B. Smith. : Co22-159/1979E-PDF

"Burgess and Appelbaum have tested neoclassicaluality theory and concluded that cost and production models yield different estimates of the properties of the underlying technology. Both of these studies used aggregate US time series and assumed that the underlying production technology was homogeneous of degree one in inputs. In this paper, it is noted that the production model used by Burgess and Appelbaum is separable between inputs and outputs whereas the cost model includes no such separability. It is further shown that it is impossible to employ production models to uniquely estimate properties of a non-separable technology which is not linearly homogeneous"--Abstract.

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