Duso, Tomaso; Herr, Annika; Suppliet, Moritz - DIW Berlin (Deutsches Institut für Wirtschaftsforschung) - 2014
We investigate the welfare impact of parallel imports using a large panel data set containing monthly information on sales, ex-factory prices, and further product characteristics for all 700 anti-diabetic drugs sold in Germany between 2004 and 2010. We estimate a two-stage nested logit model of...