International experience with alternative forms of social protection lessons for the reform process in Russia ; report for the Russian Foundation for Reforms in the framework of the project to promote structural reforming in the system of the population's social protection supported by the World Bank - Petersen, Hans-Georg 1946- (Diskussionsbeitrag / Universität Potsdam, Wirtschafts- und Sozialwissenschaftliche Fakultät, Lehrstuhl für Finanzwissenschaft, 2004)