This review and analysis of the experience with demand-response programs in the U. S. includes extensive references and case studies. A key objective of this project was to examine the relationship between energy efficiency and demand response; among the primary conclusions reached is that there is some potential for demand response and energy efficiency programs to conflict. Therefore, care must be taken to ensure that demand response policies are implemented in a way that complements energy efficiency rather than diminishes it. Energy efficiency delivers peak demand savings plus a number of other societal benefits that demand response alone cannot.