Cook, Jeffrey J., authorCulkin, J., authorEdmonds, C., authorHoffer, K. H., authorLyng, J., authorManning, D., authorPlant., T., authorCenter for the New Energy Economy, publisher2025-02-202025-02-202016-09-08https://hdl.handle.net/10217/240110Since the late 1990s, state Renewable Portfolio Standards (RPS) and Energy Efficiency Resource Standards (EERS) have been the largest drivers of the renewable energy and energy efficiency sectors. However, state target dates are quickly approaching: by 2026, 29 RPS and 11 EERS policies will need to be extended or replaced in order to maintain market certainty for continued investment and business growth. In this paper series, the Center for the New Energy Economy analyzes energy efficiency policies (Parts 1 and 2) and renewable energy policies (Parts 3 and 4). Parts 1 and 3 discuss the prospects for extending and enhancing established policies and Parts 2 and 4 propose innovative options that could work with or without an EERS and/or RPS.States have long played an important role in driving energy efficiency markets. The more conventional approach to driving these markets has been the adoption of Energy Efficiency Resource Standards (EERS). This paper describes the historical adoption of EERS policies, the extent of existing market certainty associated with these policies, the outlook for future market certainty, and concludes with policy considerations for improving market certainty via EERS policy revisions.born digitalreportsengCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.This information is free and open; however CNEE asks that if you use its information in any way that you cite the following: "Information obtained from the Advanced Energy Legislation Tracker, Colorado State University's Center for the New Energy Economy and Advanced Energy Economy."Energy policyRenewable energy sources -- Law and legislationenergy marketsText