Why Have Greenhouse Emissions in RGGI States Declined? An Econometric Attribution to Economic, Energy Market, and Policy Factors

The Regional Greenhouse Gas Initiative (RGGI) is a consortium of northeastern U.S. states that limit carbon dioxide emissions from electricity generation through a regional emissions trading program. Since RGGI started in 2009, regional emissions have sharply dropped. This analysis uses econometric models to quantify the emissions reductions due to RGGI and those due to other factors such as the recession, complementary environmental programs, and lowered natural gas prices. It shows that without RGGI, emissions would have been 24 percent higher. The program accounts for about half of the region’s post-2009 emissions reductions, which are far greater than those achieved in the rest of the United States.

Authors: Brian C. Murray and Peter T. Maniloff

Published: August 2015

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