A nonparametric efficiency analysis of German public transport companies |
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| Authors: | Christian von Hirschhausen Astrid Cullmann |
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| Affiliation: | 1. Dept. of International Economics, DIW Berlin (German Institute for Economic Research), Mohrenstraße 58, 10117 Berlin, Germany;2. Dresden University of Technology, Chair of Energy Economics and Public Sector Management, D-01062 Dresden, Germany;3. Dept. of Innovation, Manufacturing, Service, DIW Berlin (German Institute for Economic Research), Mohrenstraße 58, 10117 Berlin, Germany |
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| Abstract: | In this paper, we present a nonparametric comparative efficiency analysis of 179 communal public transport bus companies in Germany (1990–2004). We apply both deterministic data envelopment analysis (DEA) and bootstrapping to test the robustness of our estimates and to test the hypothesis of global and individual constant returns to scale. We find that the average technical efficiency of German bus companies is relatively low. We observe that the industry appears to be characterized by increasing returns to scale for smaller companies. These results would imply increasing pressure on bus companies to restructure. |
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