1. Introduction : the challenge of evaluating voluntary programs / Richard D. Morgenstern and William A. Pizer 2. The U.S. 33/50 voluntary program : its design and effectiveness / Madhu Khanna 3. Japan's Keidanren voluntary action plan on the environment / Masayo Wakabayashi and Taishi Sugiyama 4. Climate change agreements in the United Kingdom : a successful policy experience? / Matthieu Glachant and Gildas de Muizon 5. Evaluation of the Danish agreements on industrial energy efficiency / Signe Krarup and Katrin Millock 6. Assessing voluntary commitments in the German cement industry : the importance of baselines / Christoph Bohringer and Manuel Frondel 7. Evaluating voluntary U.S. climate programs : the case of climate wise / Richard D. Morgenstern, William A. Pizer, and Jhih-Shyang Shih 8. The evaluation of residential utility demand-side management programs in California / Alan H. Sanstad 9. Concluding observations : what can we learn from the case studies? / Richard D. Morgenstern and William A. Pizer.