After an introductory discussion of economic growth, the book examines neoclassical growth theories, from Solow-Swan in the 1950s and Cass-Koopmans in the 1960s to the more recent refinements. This is followed by a discussion of extensions to the model, with detailed description of heterogeneity of households. The authors then turn their searchlight on endogenous growth theory, discussing, among other topics, models of endogenous technological progress, technological diffusion, and an endogenous determination of labour supply and population. They also explain the essentials of growth accounting and apply this framework to endogenous growth models. The final chapters give an empirical analysis of regions and empirical evidence on economic growth for a broad panel of countries from 1960 to 2000.