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R&D efficiency and heterogeneity - a latent class application for the OECD
Cullmann, Astrid; Zloczysti, Petra - In: Applied economics 46 (2014) 28/30, pp. 3750-3762
Persistent link: https://www.econbiz.de/10010419934
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Efficiency analysis of German electricity distribution utilities : non-parametric tests
Hirschhausen, Christian R. von; Cullmann, Astrid; … - In: Applied economics 38 (2006) 21, pp. 2553-2566
Persistent link: https://www.econbiz.de/10003398823
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Efficiency analysis of German electricity distribution utilities – non-parametric and parametric tests
von Hirschhausen, Christian; Cullmann, Astrid; … - In: Applied economics 38 (2006) 21, pp. 2553-2566
Persistent link: https://www.econbiz.de/10007618371