An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

SAGE Model Documentation, version 1.2.0

SAGE is an applied general equilibrium model of the United States economy developed to aid in the analysis of environmental regulations and policies. It is an intertemporal model with perfect foresight, resolved at the sub-national level. This document provides technical details on the structure of the model.

Suggested Citation:

Marten, A., Schreiber, A., and Wolverton, A. 2019. SAGE Model Documentation (1.2.0). U.S.Environmental Protection Agency:

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.