efficient network maximizing social welfare, and find that the efficient graph is either empty, complete or shows a strong core … counterfactual analyses, taking into account that the network and production can dynamically adjust to shocks or policy interventions ….6%. Our study further reveals that when ignoring the network structure the impact of firm exit or mergers is significantly …

destruction leading to the obsolescence of existing technologies. We quantify the innovation gains from collaborations, and show … the interplay between knowledge diffusion and network formation can give rise to a cyclical pattern in the collaboration … large R&D collaboration network over the years 1985 to 2011. We then study the efficient network structure, compare it to …