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This paper discusses alternative methods for determining returns to scale in DEA. The methods for estimating returns to scale in DEA, as developed by Banker (1984), Banker, Charnes and Cooper (1984) and Banker and Thrall (1992), are proved to be conceptually equivalent to the two-stage methods of Fare, Grosskopf and Lovell (1985) when their assumptions apply. Here the emphasis is on the CCR model...
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