... Institute for the World Economy, Düsternbrooker Weg 120, 24105 Kiel, Germany Kiel Working Paper No. | June 2008 Rules for the Global Environment * Horst Siebert Abstract: The paper looks at the global ... In contrast to rules for trade, enforcement of environmental treaties is difficult since they deal with a public good (Yang 2006). An important aspect therefore is the transformation of identity ... written, i.e. when the properties of the game are changed. Thus, the principal task of a treaty is to change the incentive structure for the participants: “…by changing the rules of the game – by...