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1、HowMuchDoesIndustryMatter,Really?Author(s):AnitaM.McGahanandMichaelE.PorterSource:StrategicManagementJournal,Vol.18,Summer1997SpecialIssue:OrganizationalandCompetitiveInteractions(Jul.,1997),pp.15-30Publishedby:JohnWiley&SonsStableURL:http://www.jstor.org/stable/3088208Accessed
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6、nal,Vol.18(SummerSpecialIssue),15-30(1997)HOWMUCHDOESINDUSTRYMATTER,REALLY?ANITAM.McGAHAN*andMICHAELE.PORTERGraduateSchoolofBusinessAdministration,HarvardUniversity,Boston,Massa-chusetts,U.S.A.Inthispaper,weexaminetheimportanceofyear,industry,corporate-parent,andbusiness-specif
7、iceffectsontheprofitabilityofU.S.publiccorporationswithinspecific4-digitSICcategories.Ourresultsindicatethatyear,industry,corporate-parent,andbusiness-specificeffectsaccountfor2percent,19percent,4percent,and32percent,respectively,oftheaggregatevarianceinprofitability.Wealsofind
8、thattheimportanceoftheeffectsdifferssubstantiallyacros
