This text combines trade policy theory with ways of measuring the effects of policy interventions, and identifies the main strengths and weaknesses of different economic approaches to measure the structure of the costs of production. The book also shows how the range of tools of evaluation may play complementary roles in the overall process of policy evaluation, and provides a state-of-the-art critical approach to commercial policy evaluation. It is a synthesis of empirical evidence and a review of case study experience. Other books by David Greenaway include "International Trade Policy", "Economic Development and International Trade" (editor), "Current Issues in International Trade" (editor) and "Current Issues in Macroeconomics" (editor). He has also published articles for the "Economic Journal", "European Economic Review" and "Oxford Bulletin of Economics and Statistics". Chris Milner is the editor of "Export Promotion Strategies: Theory and Evidence from Developing Countries" and co-editor of "Policy Adjustment in Africa".