Eberhardt, Markus; Helmers, Christian; Strauss, Hubert - Economics Department, European Investment Bank (EIB) - 2010
A large body of literature on the estimation of private returns to R&D adopts the Griliches knowledge production … indicate the presence of substantial cross-sectional dependence in the residuals of the Griliches knowledge production function …, pointing to the presence of knowledge spillovers. Further, our estimations suggest that when ignoring the presence of …