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DIW Wochenbericht 10 / 2009

Fallende Preise in der Wasserwirtschaft: Hessen auf dem Vormarsch

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 Wetzlar, Frankfurt und Kassel erwirkte die Kartellbehörde bereits drastische Preissenkungen um bis zu 30 Prozent. ...

2009| Christian von Hirschhausen, Astrid Cullmann, Matthias Walter, Michael Zschille
DIW Weekly Report 8/9 / 2020

Nitrate Pollution of Groundwater Long Exceeding Trigger Value: Fertilization Practices Require More Transparency and Oversight

For many years now, nitrate concentrations have exceeded the trigger value of 50 milligrams per liter at nearly one-fifth of the groundwater sampling sites in Germany. Apart from impairing the ecosystem by, for example, causing eutrophication of water bodies, nitrate-polluted drinking water also damages human health; it is suspected to cause cancer. Econometric calculations using current data confirm ...

2020| Greta Sundermann, Nicole Wägner, Astrid Cullmann, Christian von Hirschhausen, Claudia Kemfert
Weekly Report 3 / 2010

Innovation Indicator 2009: Germany Has Still Some Catching up to Do

On behalf of the Deutsche Telekom Stiftung (Deutsche Telekom Foundation) and the Bundesverband der Deutschen Industrien (Federation of German Industries) DIW Berlin has investigated Germany's innovative capacity for the fifth time in an international comparison. The survey evaluates the ability of countries to create and transform knowledge into marketable products and services (i.e., innovations) ...

2010| Heike Belitz, Marius Clemens, Astrid Cullmann, Christian von Hirschhausen, Jens Schmidt-Ehmcke, Doreen Triebe, Petra Zloczysti
DIW Economic Bulletin 20 / 2016

No Differences in Efficiency Between Public and Private Utilities

The increase in municipal economic activity in the utilities sector frequently comes under scrutiny. It is presumed that public utilities have less incentive to provide efficient service than private companies. This could result in excessive costs and prices for end users. New microdata on German energy supply companies allow to conduct an empirical analysis for the whole of Germany for the first time. ...

2016| Astrid Cullmann, Maria Nieswand, Stefan Seifert, Caroline Stiel
DIW Economic Bulletin 20 / 2016

A (Re)Municipalization Trend among Energy Utilities: Truth or Myth?

In the 1990s, a number of municipalities started privatizing their energy utilities; in recent years, there has been an intensive debate about whether a paradigm shift has taken place since then. Cities and municipalities have considered putting the energy, water, gas and heat supply back into the hands of public companies; Berlin and Hamburg are two prominent examples. But is there really an overarching ...

2016| Astrid Cullmann, Maria Nieswand, Stefan Seifert, Caroline Stiel
DIW Economic Bulletin 42/43 / 2015

No Decline in Investment in Public-Sector Energy and Water Supply

A considerable share of public investment comes not only from public budgets but also from public utility companies. One major area of investment is energy and water supply, where the utility companies have substantial fixed assets in the form of distribution infrastructure. Using new microdata which has not been analyzed before, the present report shows that—unlike with the core public budgets—public ...

2015| Astrid Cullmann, Maria Nieswand, Caroline Stiel
DIW Economic Bulletin 6 / 2015

No Barriers to Investment in Electricity and Gas Distribution Grids through Incentive Regulation

Since early 2009, electricity and gas distribution in Germany has been subject to incentive regulation designed to ensure greater efficiency in electricity and gas grid operation. However, it remains to be seen how changes to the regulatory framework will affect the investment behavior of distribution system operators. Against this background, the present study empirically analyzes the investment activities ...

2015| Astrid Cullmann, Nicola Dehnen, Maria Nieswand, Ferdinand Pavel
Diskussionspapiere 1641 / 2017

Productive Efficiency and Ownership When Market Restructuring Affects Production Technologies

While the link between the ownership and productive efficiency of firms has been discussed extensively, no consensus exists regarding the superiority of one or the other in non-competitive, regulated environments. This paper applies a flexibleproduction model to test for efficiency differences associated with ownership types while allowing the production to adapt to market restructuring over time. ...

2017| Astrid Cullmann, Maria Nieswand, Julia Rechlitz
Diskussionspapiere 1555 / 2016

Finding the Right Yardstick: Regulation under Heterogeneous Environments

Revenue cap regulation is often combined with systematic benchmarking to reveal the managerial inefficiencies when regulating natural monopolies. One example is the European energy sector, where benchmarking methods are based on actual cost data, which are influenced by managerial inefficiency as well as operational heterogeneity. This paper demonstrates how a conditional nonparametric method, which ...

2016| Endre Bjoerndal, Mette Bjoerndal, Astrid Cullmann, Maria Nieswand
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