Models only provide a simplified view of our economy. In the case of the Lieberman-Warner Climate Security Act (S.2191), models can capture many of the key policy elements (e.g., the impacts of targets, timing, and offsets) but cannot incorporate all of them.

This In-Brief examines some of the models that have been used to assess the economic impacts of the Lieberman-Warner Climate Security Act (as reported out of Committee in December 2007) and puts them in context for consumers of this modeling information.