双重差分模型介绍及其应用_叶芳_已看

△[e-mail]100191△difference-in-differenceDID。。naturaltrial。DID。1．“”At1At0dd=At1－At01、“”。2．“”。dBtreatBcontrold=Btreat－Bcontrol2。、、。3．。。、。DIDDID“”“”“”“”。1．DIDDID1。5。。2〔1〕。3。DIDDIDes-timatorvs．vs．dID=△珔Ytreatment－△珔Ycontrol=珔Ytreatmentt1－珔Ytreatmentt0－珔Ycontrolt1－珔Ycontrolt03dYtreatmentcontrolt0t1。Y。·131·201323012．DIDDID。1independentpooledcross-sectionaldata/repeatedcross-sectionalda-taDID。。———。、、〔2〕。DIDYit=b0+b1·Tit+b2·Ait+b3·Tit·Ait+eit44YdependentTAdummyvaria-ble。T·A。、、、、。e。it。i=01t=01。iYVYi1△Yi1=△Yi1－△Yi0=b0+b1+b2+b3－b0+b2=b1+b35iY△Yi0△Yi0=△Yi1－△Yi0=b0+b1－b0=b16△△Yi△△Yi=△Yi1－△Yi0=b1+b3－b1=b37b3。Eeit|Ait=088“LINE”、、、OLS。“LINE”、。2paneldata/longitudinalda-taDID。。①②〔2〕。8。eit。aifixedeffect。i。Yit=b0+b1·Tit+b2·Ait+b3·Tit·Ait+ai+eit'949ai。。aiai△Yit1－t0=b1·△T+b3·△T·G+△eit10DTd0b1·△T10△Yi=d0+b3·DT·G+△eit11。。。3．DID“A”、“T”。R2、。。DID1．DID1985AshenfelterCard·231·ChineseJournalofHealthStatisticsFeb2013Vol．30No．1〔3〕DID。。20016YipWEgglestonK〔4〕。12ConoverCJMedicaid〔5〕。DID。、DID591〔6〕。2．DIDpubmed2001201111124DIDDID1。1DID124DID。〔7－9〕、〔10－12〕〔13－14〕。74%6%。2%。3．DIDCNKI、3〔615－16〕。DIDDID“”“”。“”DID。Hausmanprobit。instrumen-talvariable2SLS〔17－18〕。“”。Wooldridge'stest〔19〕。FGLS〔2〕。DIDprobit、logit、tobitDID。probitDIDPY=1=fb0+b1·Tit+b2·Ait+b3·Tit·Ait+ai+eit12。Puhani〔20〕AiC〔21〕。。。。DID。。DID。、DID。1．HeckmanJamesJ．“Comment”InEmpiricalFoundationsofHouseholdTaxationed．MartinFeldsteinandJamesPoterba．ChicagoNBERandUniversityofChicagoPress1996．2．WooldridgeJefferyM．Introductoryeconometricsamodernapproach．South-WesternCollegePub2ndedition2002．3．AshenfelterOCardD．“Usingthelongitudinalstructureofearningstoestimatetheeffectoftrainingprograms”ReviewofEconomicsandStatistics198567648-660．4．YipWEgglestonK．ProviderpaymentreforminChinathecaseofhospitalreimbursementinHainanprovince．HealthEcon2001104325-339．5．ConoverCJRankinPJSloanFA．Effectsoftennesseemedicaidman-agedcareonobstetricalcareandbirthoutcomes．JHealthPolitPolicyLaw20012661291-324．6．．·331·20132301．2005844-53．7．ParenteSTEvansWNSchoenmanJAetal．Healthcareuseandex-pendituresofmedicareHMOdisenrollees．HealthCareFinancRev200526331-43．8．NolanA．Anextensionineligibilityforfreeprimarycareandavoidablehospitalisationsanaturalexperiment．SocSciMed2011737978-985．9．SubramanianS．Impactofmedicaidcopaymentsonpatientswithcanc-erlessonsformedicaidexpansionunderhealthreform．MedCare2011499842-847．10．AldermanHNdiayeBLinnemayrSetal．Effectivenessofacommuni-ty-basedinterventiontoimprovenutritioninyoungchildreninSenegaladifferenceindifferenceanalysis．PublicHealthNutr2009125667-673．11．BuschABFrankRGLehmanAFetal．Schizophreniaco-occurringsubstanceusedisordersandqualityofcarethedifferentialeffectofamanagedbehavioralhealthcarecarve-out．AdmPolicyMentHealth2006333388-397．12．WardMAXuY．Pharmacist-providedtelephonicmedicationtherapymanagementinanMAPDplan．AmJManagCare20111710e399-e409．13．DanoAM．Roadinjuriesandlong-runeffectsonincomeandemploy-ment．HealthEcon2005149955-970．14．TorcheF．Theeffectofmaternalstressonbirthoutcomesexploitinganaturalexperiment．Demography2011．15．．．201158-25．16．．．20103226-228．17．BertrandMDufloE2002．MullainathanS．HowmuchshouldwetrustDifferences-in-DifferencesestimatesNBERWorkingPaperNo．8841．18．http//．hks．harvard．edu/fs/aabadie/didp．pdf．19．DrykkerDM．Testingforserialcorrelationinlinearpanel-datamodels．TheStataJournal200332168-177．20．Puhani．Thetreatmenteffectthecrossdifferenceandtheinteractionterminnonlinear“Difference-in-Differences”models．IZADiscussionPaper2008No．3478．21．AiCNortonEC．Interactiontermsinlogitandprobitmodels．Econom-icsLetters200380123-129．126。、ICD。ICDICD。2ICD、、ICDICD-10、ICD-10ICD。3。、、。4ICDICD《》ICDICD-10。1．．ICDDRCG．2008211147-49．2．．．2011211034-35．3．．、．20045639-40．4．．．20056540-41．5．．．200138．6．．ICD-10．200671226．·431·ChineseJournalofHealthStatisticsFeb2013Vol．30No．1