20% by 2020? Economy-wide impacts of energy efficiency improvement in Germany.

Lehr, U., Lutz, C., Pehnt, M., Lambrecht, U., Seefeldt, F., Schlomann, B. & Fleiter, T. (2011): 20% by 2020? Economy-wide impacts of energy efficiency improvement in Germany. GWS Discussion Paper 11/2, Osnabrück.