Research Collection Working Paper ‘Underlying Energy Efficiency’ in the US Author(s): Filippini, Massimo; Hunt, Lester C. Publication Date: 2013-07 Permanent Link: https://doi.org/10.3929/ethz-a-009905549 Rights / License: In Copyright - Non-Commercial Use Permitted This page was generated automatically upon download from the ETH Zurich Research Collection . For more information please consult the Terms of use . ETH Library