A systems GMM estimation method is used to estimate the Feldstein-Horioka equation from 1960-2007 with a panel of 12 OECD countries. It is found that the Feldstein-Horioka puzzle exists in a weaker form with a much reduced saving retention coefficient. The Bretton Woods agreement in particular has weakened the Feldstein-Horioka puzzle by significantly improving international capital mobility. In comparison the Maastricht agreement seems to have improved capital mobility only by a small magnitude. The Blundell and Bond approach systems GMM method and the structural break tests of Mancini-Griffoli and Pauwels are used in this paper.