Has globalization led to a convergence in policy-making across nations and, if so, what are the causal mechanisms? This book analyses the extent to which the environmental policies of nation states have converged over the last thirty years and whether this convergence has led to a strengthening or weakening of environmental standards (a race to the top, or a race to the bottom). It also analyses the factors that account for these developments. Based on a unique empirical data set, the study covers the development of a wide range of environmental policies in twenty-four OECD countries, including EU member states as well as Norway, Switzerland, Japan, Mexico and the USA, with particular emphasis on the impact of institutional and economic interlinkages among these countries.