The determinants of economic growth have long been a staple interest of economists, who have lately turned their attention to the extent to which growth rates among countries, or among regions within a country, tend to converge. This volume provides a useful source of the latest thinking of professional economists on these issues. Among other topics, the papers cover the relative importance of R&D, investment in public infrastructure, education, trade policies, even social structure. They are addressed to a professional audience, but the interesting contributions by De Long, Audretsch, Lal and Olson are accessible to others as well.