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  "Description": "Fitting of non-parametric production frontiers for use in\nefficiency analysis. Methods are provided for both a smooth\nanalogue of Data Envelopment Analysis (DEA) and a\nnon-parametric analogue of Stochastic Frontier Analysis (SFA).\nFrontiers are constructed for multiple inputs and a single\noutput using constrained kernel smoothing as in Racine et al.\n(2009), which allow for the imposition of monotonicity and\nconcavity constraints on the estimated frontier.",
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