Evaluating agri environmental policies : design practice and results ; [OECD Workshop on Evaluating Agri Environmental Policies ... held on 6 8 December 2004 in Paris] These conference proceedings present a series of evaluations of agri environmental policies in OECD countries. They examine how effective the policies have been in achieving objectives and what policy makers have learned about the design and implementation of their policies. These proceedings show that different methods of policy evaluation are complementary. Most countries focus on evaluating the environmental effectiveness rather than the economic efficiency of policies using physical indicators rather than monetary values. Many policies are achieving their environmental objectives but are taking longer than originally anticipated. The initiative being taken in many countries to incorporate monitoring and data collection into program design and implementation is a positive development. But a number of steps need to be taken to improve the quality of evaluations including the better articulation of policy goals and objectives improving data quality and establishing baselines for comparison. Publishers summary