First published in 1999, this volume is intended to encourage appreciation of the cardinal significance for integrating macroeconomic policy variables and environmental factors and any other relevant externalities into sectoral policy analysis as a tool for improving choice of strategic factors in agricultural development, investment of allocative efficiency in agriculture and environmental protection and overall agricultural development management. The main concern of Matthew Okai is for choosing realistic policy instruments to promote development, quantifying constraints and evaluating the impacts of policy on objectives.