Working Paper | 2013

From Green Users to Green Voters

by Diego Comin and Johannes Rode


We estimate the effect of the diffusion of photovoltaic (PV) systems on the fraction of votes obtained by the German Green Party. The logistic diffusion of PV systems offers a new identification strategy. We take first differences and instrument adoption rates (i.e. the first difference in the diffusion level) by lagged diffusion levels. The existing rationales for non-linearities in diffusion, and ubiquity of logistic curves ensure that our instrument is orthogonal to variables that directly affect voting patterns. We find that the diffusion of domestic PV systems caused 25 percent of the increment in green votes between 1998 and 2009.

Keywords: Voting; Political Elections; Technology Adoption; Environmental Sustainability; Green Technology Industry; Public Administration Industry; Germany;


Comin, Diego, and Johannes Rode. "From Green Users to Green Voters." NBER Working Paper Series, No. 19219, July 2013.