D. Gale Johnson, one of the foremost agricultural economists, has changed the conduct of research on agricultural economics and policy. The papers brought together here reveal of his influence on the creation of modern agricultural economics. This volume collects Johnson's most important work. These papers explore the consequences of government intervention in United States and world agriculture; the economics of agricultural supply and of rural labour and human capital issues; and the analysis of agricultural productivity in poor countries, including centrally-planned economies of China and Eastern Europe. Models of precise reasoning and powerful empirical research, the papers cover a range of topics - from US commodity price policy to the economics of population control and farm policy reform in China.