Are Information and Communication Technology (ICT) and Research &\ud Development (R&D) productive inputs or efficiency determinants? This is the topic\ud of this paper, which analyses a sample of 2691 Italian manufacturing firms over the\ud period 2007–2009. Data are from a merged EFIGE–AIDA dataset. The empirical\ud setting is based on a production function estimated through the stochastic frontier\ud approach. ICT and R&D are used once as inputs, once as efficiency determinants.\ud The results show that the elasticities of production with respect to ICT and R&D\ud investments are quite high (0.08 for ICT and 0.04 for R&D) when they enter into the\ud model only as inputs. We also documented that ICT and R&D contribute positively\ud to explain the efficiency scores
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