Why does corporate governance--front page news with the collapse of Enron, WorldCom, and Parmalat--vary so dramatically around the world? This book explains how politics shapes corporate governance--how managers, shareholders, and workers jockey for advantage in setting the rules by which companies are run, and for whom they are run. It combines a clear theoretical model on this political interaction, with statistical evidence from thirty-nine countries of Europe, Asia, Africa, and North and South America and detailed narratives of country cases. This book differs from most treatments by explaining differences in minority shareholder protections and ownership concentration among countries in terms of the interaction of economic preferences and political institutions. It explores in particular the crucial role of pension plans and financial intermediaries in shaping political preferences for different rules of corporate governance