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1、EconometricAnalysisofCountDataRainerWinkelmannEconometricAnalysisofCountDataFifthedition123Prof.Dr.RainerWinkelmannUniversityofZurichSocioeconomicInstituteZürichbergstr.148032ZürichSwitzerlandwinkelmann@sts.uzh.chISBN978-3-540-77648-2e-ISBN978-3-540-78389-3DOI10.1007/978-3-540-783
2、89-3LibraryofCongressControlNumber:2008922297c2008Springer-VerlagBerlinHeidelbergThisworkissubjecttocopyright.Allrightsarereserved,whetherthewholeorpartofthematerialisconcerned,specificallytherightsoftranslation,reprinting,reuseofillustrations,recitation,broadcasting,reproduction
3、onmicrofilmorinanyotherway,andstorageindatabanks.DuplicationofthispublicationorpartsthereofispermittedonlyundertheprovisionsoftheGermanCopyrightLawofSeptember9,1965,initscurrentversion,andpermissionforusemustalwaysbeobtainedfromSpringer.ViolationsareliabletoprosecutionundertheGerm
4、anCopyrightLaw.Theuseofgeneraldescriptivenames,registerednames,trademarks,etc.inthispublicationdoesnotimply,evenintheabsenceofaspecificstatement,thatsuchnamesareexemptfromtherelevantprotectivelawsandregulationsandthereforefreeforgeneraluse.Production:le-texJelonek,Schmidt&VöcklerG
5、bR,LeipzigCoverdesign:WMXDesignGmbH,HeidelbergPrintedonacid-freepaper987654321springer.comPrefaceThe“countdata”fieldhasfurtherflourishedsincethepreviouseditionofthisbookwaspublishedin2003.Thedevelopmentofnewmethodshasnotsloweddownbyanymeans,andtheapplicationofexistingonesinappliedwo
6、rkhasexpandedinmanyareasofsocialscienceresearch.This,initself,wouldbereasonenoughforupdatingthematerialinthisbook,toensurethatitcontinuestoprovideafairrepresentationofthecurrentstateofresearch.Inaddition,however,Ihaveseizedtheopportunitytoundertakesomemajorchangestotheorganization
7、ofthebookitself.Thecorematerialoncross-sectionmodelsforcountdataisnowpresentedinfourchapters,ratherthanintwoaspreviously.ThefirstofthesefourchaptersintroducesthePoissonregressionmodel,anditsestimationbymaximumlikelihoodorpseudomaximumlikelihood.Thesecondfocusesonunobservedheterogen
8、eity,thethirdonendogeneityandnon-
