1. Review of World Energy 2020;Statistical,2020
2. Consumer willingness to pay for appliances produced by Green Power Partners;Ward;Energy Econ.,2011
3. Status and trends in the voluntary market, paper presented at the online Renewable Energy Markets Conference, September 23;Heeter,2020
4. Status and Trends in the U.S. Voluntary Green Power Market: 2017 Data;O'Shaughnessy,2018
5. Public goods and private interests: understanding non-residential demand for green power;Wiser;Energy Pol.,2001