In 2007 the US Congress began considering a set of bills to implement a cap-and-trade system to limit the nation's greenhouse gas (GHG) emissions. The MIT Integrated Global System Model (IGSM)-and its economic component, the Emissions Prediction and Policy Analysis (EPPA) model-were used to...

The emergence of U.S. shale gas resources to economic viability affects the nation's energy outlook and the expected role of natural gas in climate policy. Even in the face of the current shale gas boom, however, questions are raised about both the economics of this industry and the wisdom of...