Hendrik Ritter University of Magdeburg   Universitätsplatz 2 Magdeburg, Sachsen-Anhalt 39106 GERMANY (DE)   hendrik.ritter@ovgu.de   http://www.vwl1.ovgu.de           JEL Areas: Q3 : Nonrenewable Resources and Conservation: General D7 : Analysis of Collective Decision-Making: General