From the inbox;
Resources for the Future (RFF) is launching a multi-year, multidisciplinary research initiative to improve the methodology used to calculate the social cost of carbon—an economic tool used to quantify both the benefits to society of reducing carbon dioxide emissions from the atmosphere and the harm to society from emitting more carbon dioxide.
Here is the link: http://www.rff.org/research/collection/updating-and-improving-social-cost-carbon.