@techreport{FroschHarhoffHoisletal.2015, author = {Frosch, Katharina and Harhoff, Dietmar and Hoisl, Karin and Steinle, Christian and Zwick, Thomas}, title = {Clean Technology Innovations in Germany: Human Capital Accumulation under Heterogeneous Knowledge Inputs}, pages = {34}, year = {2015}, language = {en} } @techreport{FroschHoislSteinleetal.2015, author = {Frosch, Katharina and Hoisl, Karin and Steinle, Christian and Zwick, Thomas}, title = {Humankapitalakkumulation von deutschen Erfindern in Schl{\"u}sseltechnologien}, pages = {15}, year = {2015}, language = {de} }