This report is the product of contributions from many individuals. The project was sponsored by the Yale University Program on Nonmarket Accounts which, in turn, was funded by a grant from the Glaser Progress Foundation. The Yale program is directed by William Nordhaus, whose long history of pioneering research in this and related areas—dating back three decades to his work with James Tobin on measures of economic welfare and continuing through his chairing of the Nature’s Numbers panel—helped to establish the foundations for this panel’s work. Dr. Nordhaus, along with Martin Collier of the Glaser Progress Foundation, attended the first meeting and, in articulating their hopes for the study, helped the panel sharpen its vision of their charge. The panel is grateful also to Dan Melnick who served as liaison to the panel for the Yale Program and contributed valuable suggestions and points of clarification along the way.
