A paper presented during the 2013 Study on Energy Efficiency in Energy, hosted by the American Council for an Energy-Efficient Economy, shows the nine companies certified in Superior Energy Performance (SEP) had an average energy improvement of 10% over the first 18 months. The average payback period for those companies was 1.7 years. The full results can be seen in the Lawrence Berkeley National Laboratory Report Assessing the Costs and Benefits of the Superior Energy Performance Program.