1. Redefining Progress: homepage for Redefining Progress, "a nonprofit organization that develops policies and tools that reorient the economy to value people and nature first." Their site includes many publications on integrating environmental externalities into market prices.
2. Electricity Generation and Environmental Externalities: a report published by the U.S. Department of Energy that estimates the magnitude of the externalities associated with electricity generation.
3. Association of Environmental and Resource Economists’ Newsletter: website for the most recent copy of a newsletter published by the Association of Environmental and Resource Economists, an organization "established as a means of exchanging ideas, stimulating research, and promoting graduate training in resource and environmental economics." The newsletter includes a few short articles on resource issues.
4. Instruments for Change: a compendium of case studies of economic, regulatory, informational, and planning instruments designed to promote sustainable production and consumption.
5. Center for a Sustainable Economy: the homepage for the Center for a Sustainable Economy, whose researchers "use economic modeling and policy analysis to determine the impact of environmental taxes, tax incentives, auctioned permits and similar market-based tools on the economy, the environment and society." The site includes several papers on environmental tax reform.