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Results 1-10 of 16.
Year of PublicationTitleAuthor(s)
2008Next stop: restructuring? A nonparametric efficiency analysis of German public transport companiesvon Hirschhausen, Christian R.; Cullmann, Astrid
2008International benchmarking in electricity distribution: a comparison of French and German utilitiesCullmann, Astrid; Crespo, Hélène; Plagnet, Marie-Anne
2009Overcoming data limitations in nonparametric benchmarking: applying PCA-DEA to natural gas transmissionNieswand, Maria; Cullmann, Astrid; Neumann, Anne
2009Unobserved heterogeneity and international benchmarking in public transportCullmann, Astrid; Farsi, Mehdi; Filippini, Massimo
2009Innovation, R&D efficiency and the impact of the regulatory environment: a two stage semi-parametric DEA approachCullmann, Astrid; Schmidt-Ehmcke, Jens; Zloczysti, Petra
2008Key parameters and efficiency of Mexican manufacturing: Are there still differences between the north and the south? An application of nested and stochastic frontier panel data modelsBraun, Frauke G.; Cullmann, Astrid
2009Benchmarking and firm heterogeneity in electricity distribution: a latent class analysis of GermanyCullmann, Astrid
2015Productivity in electricity retail after market liberalisation: Analysing the effects of ownership and firm's governance structureStiel, Caroline; Cullmann, Astrid; Nieswand, Maria
2017Productive efficiency and ownership when market restructuring affects production technologiesCullmann, Astrid; Nieswand, Maria; Rechlitz, Julia
2009The globalization of steam coal markets and the role of logistics: an empirical analysisZaklan, Aleksandar; Cullmann, Astrid; Neumann, Anne; von Hirschhausen, Christian R.