relation: http://eprints.imtlucca.it/3056/
title: Knowledge Spillovers through Networks of Scientists
creator: Zacchia, Paolo
subject: HB Economic Theory
subject: HD Industries. Land use. Labor
subject: T201 Patents. Trademarks
description: In this paper I directly test the hypothesis that interactions between inventors of different  firms drive knowledge spillovers. I construct a network of publicly traded companies  in which each link is a function of the relative proportion of two firms’ inventors who  have former patent collaborators in both organizations. I use this measure to weigh the  impact of R&D performed by each firm on the productivity and innovation outcomes  of its network linkages. An empirical concern is that the resulting estimates may reflect  unobserved, simultaneous determinants of firm performance, network connections and  external R&D. I address this problem with an innovative IV strategy, motivated by a  game-theoretic model of firm interaction. I instrument the R&D of one firm’s connections  with that of other firms that are sufficiently distant in network space. With the  resulting spillover estimates, I calculate that among firms connected to the network  the marginal social return of R&D amounts to approximately 112% of the marginal  private return
date: 2017
type: Working Paper
type: NonPeerReviewed
format: application/pdf
language: en
rights: cc_by_nc_nd
identifier: http://eprints.imtlucca.it/3056/1/Network_Spillovers_Text%2BAppendices.pdf
identifier:   Zacchia, Paolo  Knowledge Spillovers through Networks of Scientists.  Working Paper       (Submitted)