Inhaltsangabe:Abstract: Public-private partnerships are a tool that is increasingly used by development agencies to improve infrastructure in developing countries. This concept is also employed in piped water provision. The failure of some major projects suggests that there is considerable risk involved when the public and private sectors combine forces. The fact that piped water provision is a natural monopoly and therefore needs extensive regulation makes the cooperation between the public and private sector very difficult. Indeed, weak regulation is the probably the most important risk factor. Other risk factors include political instability, inadequate tariff and contract design, and lack of public support. These risk factors are analyzed using four case studies, two failed ones and two that are considered relatively successful. The analysis aims to find answers to the question whether the initiative of development agencies to heavily promote the concept of public-private partnerships in water and sanitation is justified and appropriate. Einleitung: Public-private partnerships werden im verst?rkten Ma?e von Institutionen f?r Entwicklungshilfe eingesetzt, um die Infrastruktur in Entwicklungsl?ndern zu verbessern. Dieses Konzept wird unter anderem auch in der Wasserversorgung verwendet. Das Fehlschlagen von einigen wichtigen Projekten weist darauf hin, dass ein gewisses Risiko existiert, wenn der ?ffentliche Sektor und die Privatwirtschaft zusammen arbeiten. Der Fakt, dass ...