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Bird, L., E. Holt, J. Sumner, and C. Kreycik, 2010. Voluntary Green Power Market Forecast through 2015, NREL/TP-6A2-48158. Golden, CO: National Renewable Energy Laboratory, May. (PDF 695 KB)
Bird, L., J. Sumner, 2010. Green Power Marketing in the United States: A Status Report (2009 Data). NREL/TP-6A20-49403. Golden, CO: National Renewable Energy Laboratory, September. (PDF 1.1 MB)
Bird, L., D. Hurlbut, P. Donohoo, K. Cory, and C. Kreycik, 2010. Examination of the Regional Supply and Demand Balance for Renewable Electricity in the United States through 2015 (Revised). NREL/TP-6A2-45041. Golden, CO: National Renewable Energy Laboratory, June. Original publication date: March 2009 (PDF 889 KB)
Environmental Leader and Retailer Daily, 2010. Enterprise Renewable Energy Adoption Survey: Benchmarking Onsite Renewable Energy Generation, Purchasing & REC Buying. Environmental Leader, LLC, published in association with Retailer Daily. (PDF 665 KB)
Environmental Tracking Network of North America (ETNNA), 2010. The Intersection Between Carbon, RECs, and Tracking: Accounting and Tracking the Carbon Attributes of Renewable Energy. White Paper, February. (PDF 406 KB)
Jacobsen, G.D., M.J. Kotchen, and M.P. Vandenbergh. (2010). "The Behavioral Response to Voluntary Provision of an Environmental Public Good: Evidence from Residential Electricity Demand." National Bureau of Economic Research, Cambridge, MA. Working Paper 16608 / JEL No. H41,Q42,Q54. December.
U.S. Department of Energy, U.S. Environmental Protection Agency, World Resources Institute, Center for Resource Solutions, 2010. Guide to Purchasing Green Power: Renewable Electricity, Renewable Energy Certificates, and On-Site Renewable Generation (Updated). Washington, D.C. ISBN: 1-56973-577-8. March. (PDF 2.0 MB)