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1、STATADATA-MANAGEMENTREFERENCEMANUALRELEASE13®AStataPressPublicationStataCorpLPCollegeStation,Texas®Copyrightc1985–2013StataCorpLPAllrightsreservedVersion13PublishedbyStataPress,4905LakewayDrive,CollegeStation,Texas77845TypesetinTEXISBN-10:1-59718-131-5ISBN-13:978-1-5
2、9718-131-0Thismanualisprotectedbycopyright.Allrightsarereserved.Nopartofthismanualmaybereproduced,storedinaretrievalsystem,ortranscribed,inanyformorbyanymeans—electronic,mechanical,photocopy,recording,orotherwise—withoutthepriorwrittenpermissionofStataCorpLPunlessper
3、mittedsubjecttothetermsandconditionsofalicensegrantedtoyoubyStataCorpLPtousethesoftwareanddocumentation.Nolicense,expressorimplied,byestoppelorotherwise,toanyintellectualpropertyrightsisgrantedbythisdocument.StataCorpprovidesthismanual“asis”withoutwarrantyofanykind,e
4、itherexpressedorimplied,including,butnotlimitedto,theimpliedwarrantiesofmerchantabilityandfitnessforaparticularpurpose.StataCorpmaymakeimprovementsand/orchangesintheproduct(s)andtheprogram(s)describedinthismanualatanytimeandwithoutnotice.Thesoftwaredescribedinthismanu
5、alisfurnishedunderalicenseagreementornondisclosureagreement.Thesoftwaremaybecopiedonlyinaccordancewiththetermsoftheagreement.ItisagainstthelawtocopythesoftwareontoDVD,CD,disk,diskette,tape,oranyothermediumforanypurposeotherthanbackuporarchivalpurposes.Theautomobileda
6、tasetappearingontheaccompanyingmediaisCopyrightc1979byConsumersUnionofU.S.,Inc.,Yonkers,NY10703-1057andisreproducedbypermissionfromCONSUMERREPORTS,April1979.Stata,,StataPress,Mata,,andNetCourseareregisteredtrademarksofStataCorpLP.StataandStataPressareregisteredtradem
7、arkswiththeWorldIntellectualPropertyOrganizationoftheUnitedNations.NetCourseNowisatrademarkofStataCorpLP.Otherbrandandproductnamesareregisteredtrademarksortrademarksoftheirrespectivecompanies.Forcopyrightinformationaboutthesoftware,typehelpcopyrightwithinStata.Thesug
8、gestedcitationforthissoftwareisStataCorp.2013.Stata:Release13.StatisticalSoftware.CollegeStation,TX:StataCorpLP.Contentsintro......
