This grant provides three years of continued support to the E2e project, a multi-institutional collaboration of researchers who have come together to examine the “energy efficiency paradox,” the name given to the puzzling phenomenon of consumers’ failure to widely adopt money-saving energy efficiency practices, products, and technologies. Headquartered at the University of California, Berkeley and with organizational nodes at the Massachusetts Institute of Technology and the University of Chicago, the E2e collaboration brings scholars and students together to share and access data, connect with policymakers and the private sector, and work together on the design and implementation of individual and joint research projects. Topics being investigated by E2e researchers include understanding consumer decision-making in the residential sector; how framing, discounting, and choice architecture contribute to informational and behavioral inefficiencies; how to use insights from behavioral psychology and economics to increase the impact of policy interventions; and how well engineering models predict actual real world efficiency gains of adopted technologies. Grant funds provide operating support for the project, including funds for the expansion of the research network to include new scholars, publication of a working paper and policy brief series, data acquisition, a seed funding competition for junior scholars, the development of an online tool to help researchers craft effective experimental design, and a series of training workshops for students and practitioners.