?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Feprints.imtlucca.it%2F3056%2F&rft.title=Knowledge+Spillovers+through+Networks+of+Scientists&rft.creator=Zacchia%2C+Paolo&rft.subject=HB+Economic+Theory&rft.subject=HD+Industries.+Land+use.+Labor&rft.subject=T201+Patents.+Trademarks&rft.description=In+this+paper+I+directly+test+the+hypothesis+that+interactions+between+inventors+of+different%0D%0Afirms+drive+knowledge+spillovers.+I+construct+a+network+of+publicly+traded+companies%0D%0Ain+which+each+link+is+a+function+of+the+relative+proportion+of+two+firms%E2%80%99+inventors+who%0D%0Ahave+former+patent+collaborators+in+both+organizations.+I+use+this+measure+to+weigh+the%0D%0Aimpact+of+R%26D+performed+by+each+firm+on+the+productivity+and+innovation+outcomes%0D%0Aof+its+network+linkages.+An+empirical+concern+is+that+the+resulting+estimates+may+reflect%0D%0Aunobserved%2C+simultaneous+determinants+of+firm+performance%2C+network+connections+and%0D%0Aexternal+R%26D.+I+address+this+problem+with+an+innovative+IV+strategy%2C+motivated+by+a%0D%0Agame-theoretic+model+of+firm+interaction.+I+instrument+the+R%26D+of+one+firm%E2%80%99s+connections%0D%0Awith+that+of+other+firms+that+are+sufficiently+distant+in+network+space.+With+the%0D%0Aresulting+spillover+estimates%2C+I+calculate+that+among+firms+connected+to+the+network%0D%0Athe+marginal+social+return+of+R%26D+amounts+to+approximately+112%25+of+the+marginal%0D%0Aprivate+return&rft.date=2017&rft.type=Working+Paper&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.rights=cc_by_nc_nd&rft.identifier=http%3A%2F%2Feprints.imtlucca.it%2F3056%2F1%2FNetwork_Spillovers_Text%252BAppendices.pdf&rft.identifier=++Zacchia%2C+Paolo++Knowledge+Spillovers+through+Networks+of+Scientists.++Working+Paper+++++++(Submitted)+++