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1、AGINGANDPRODUCTIVITYAMONGECONOMISTS,AGINGANDPRODUCTIVIAGINGANDPRDUTIVITANGENISTS英语作文网为您收集作文网Abstrat--Enists’prdutivitvertheirareersandaseasuredbpubliatininleadingurnalsdelinesversharplithageThereisndifferenebageintheprbabilitthatanartilesubittedtaleadin
2、gurnalillbeaeptedRatesfdeliningprdutivitarengreaterangthevertppublishersthanangthers,andtheprbabilitfaeptaneisinreasinglrelatedttheauthr’squalitratherthantheauthr’sageItisellnnthatprdutivitdelinesithageinaiderangefativitiesLehan(193)suggestsanearlpeainp
3、rdutivitinavarietfsientifiandartistiendeavrs,andDiand(1986)duentsthepatternfrseveralshlarlpursuitsLevinandStephan(1992)prvidelearevidenethatthisdelineexistsevenafterarefulatteptstauntfrindividualandhrtdifferenesFair(1994)findsdelinesinphsialabilitangeli
4、terunners,asdesLdall(1968,pp113passi)inphsialabilitiesftheppulatingenerallInthisstudeexaineprdutivitdelinesinurnfieldTheainneresultsarisefruruseftdifferenttpesfinfratin,theequivalentfhusehldandestablishentdata,tstudthestnefieldveressentiallthesaeperidft
5、ieSetinIdisussesthegeneralresultsnagingandprdutivit,hereassetinIIpresentsevideneftheiprtanefhetergeneitIDeliningPrdutivitithAgeUsingtheAerianEniAssiatin(AEA)Diretrfebers,eidentifiedtenuredenisfaultat17tpresearhinstitutinsandbtainedtheearsftheirPhDdegree
6、s[1]iththeitatinindexftheurnalfEniLiteratureerepliatedprtinsftheurrialavitaefeahfthe208enistsurrentlintheenisdepartentsfthseinstitutinshreeivedPhDdegreesbeteen199and1983[2]Teasureprdutivitenstrutthreeindexes,biningpaperspublishedinrefereedurnalsPrirrese
7、arhsuggeststhat,atleastintersfsalardeterinatin,thereturnsfrnnreferredpubliatinsarequitelSauer(1988),sthateignresuhpubliatinsinalulatingtheseeasuresI1eightsanartilebtheurnalhereitappearsbasednitatinstthaturnal,usingvaluesgeneratedbLabandandPiette(1994)Th
8、isindexdistinguishesstrnglangurnalsFrexaple,theurnalfPlitialEnhasaeightf91,hereasEniInquirhasaeightf79InnstrutingI1eusetheeightsassiatediththedeadeinhihtheartileserepublishedI2distinguishessehatlessangurnalsbassigningallartilesin