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Fallende Preise in der Wasserwirtschaft: Hessen auf dem Vormarsch

von Hirschhausen, Christian; Cullmann, Astrid; Walter, … - In: DIW Wochenbericht 76 (2009) 10, pp. 150-155

Der deutschen Wasserwirtschaft könnte in naher Zukunft ein grundlegender Wandel ihrer Geschäftspraktiken bevorstehen. Durch die jüngeren Kartellverfahren gegen kommunale Wasserunternehmen in Hessen ist ein neues Kapitel im deutschen Wassersektor aufgeschlagen worden. In Verfahren gegen...

Persistent link: https://www.econbiz.de/10011601964

Ermittlung möglicher Fusionseffekte im ÖPNV : eine Effizienzanalyse für Nordrhein-Westfalen

Hirschhausen, Christian R. von; Cullmann, Astrid; … - In: Internationales Verkehrswesen 60 (2008) 12, pp. 490-494

Persistent link: https://www.econbiz.de/10003783103

Potential gains from mergers in local public transport : an efficiency analysis applied to Germany

Walter, Matthias (contributor); Cullmann, Astrid (contributor) - 2008

We analyze potential gains from hypothetical mergers in local public transport using the non-parametric Data Envelopment Analysis with bias corrections by means of bootstrapping. Our sample consists of 41 public transport companies from Germany's most densely populated region, North...

Persistent link: https://www.econbiz.de/10003779633

Potential Gains from Mergers in Local Public Transport : An Efficiency Analysis Applied to Germany

Walter, Matthias; Cullmann, Astrid - 2009

Persistent link: https://www.econbiz.de/10014206812

Fallende Preise in der Wasserwirtschaft: Hessen auf dem Vormarsch

Hirschhausen, Christian von; Cullmann, Astrid; Walter, … - In: DIW Wochenbericht 76 (2009) 10, pp. 150-155

Persistent link: https://www.econbiz.de/10005071043

Efficiency and Competition in Public Transport

Walter, Matthias - 2010

Persistent link: https://www.econbiz.de/10003935386

The Graphical Traveling Salesperson Problem has no integer programming formulation in the original space

Walter, Matthias - In: Operations research letters 49 (2021) 4, pp. 623-624

Persistent link: https://www.econbiz.de/10012649050

Some determinants of cost efficiency in German public transport

Walter, Matthias - In: Journal of transport economics and policy 45 (2011) 1, pp. 1-20

Persistent link: https://www.econbiz.de/10009130756

Recognizing series-parallel matrices in linear time

Walter, Matthias - In: INFORMS journal on computing : JOC ; charting new … 35 (2023) 6, pp. 1404-1418

Persistent link: https://www.econbiz.de/10014471525

Benchmarking and firm heterogeneity in electricity distribution : a latent class analysis of Germany

Cullmann, Astrid - 2009

In January 2009 Germany introduced incentive regulation for the electricity distribution sector based on results obtained from econometric and nonparametric benchmarking analysis. One main problem for the regulator in assigning the relative efficiency scores are unobserved firm-specific factors...

Persistent link: https://www.econbiz.de/10003832698