Widmer, Philippe K.; Zweifel, Peter; Farsi, Mehdi - Institut für Volkswirtschaftslehre, … - 2011
. However, the standard cost frontier model yields biased efficiency scores because it ignores technological heterogeneity … frontier model, designed to overcome the problem of unobserved heterogeneity in stochastic frontier analysis. Using a sample of … 100 Swiss hospitals covering the years 2004 to 2007 and applying Bayesian inference, significant heterogeneity is found …