technology affects the efficiency and productivity in innovation of technology acquiring firms. Using the stochastic frontier … innovative productivity than non-acquiring firms do. Thus, this study provides evidence on complementarity between internal and … efficiency. Moreover, we find that firm size significantly contributes to innovative efficiency and productivity of external …

We study the determinants and productivity effects of regional transportation infrastructure investment in France …, Germany, Italy, and Spain. We estimate productivity effects with regional production functions for each country controlling …