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1、PaUOLnnValnsoosQ.2-qndPolicyResearchWorkingPaper10656CorrectingSamplingandNonresponseBiasinPhoneSurveyPovertyEstimationUsingReweightingandPovertyProjectionModelsP ZOfnV alnsoosQ.2-qndKexinZhangShinyaTakamatsuNobYoshidaworldBankgroupxt-rPovertyandEquityGlobalPracticeDecember2023PolicyResearchWorkingP
2、aper10656AbstractTo monitor the evolution of household living conditions during the COVID-19 pandemic, the World Bank conducted COVID-19 High-Frequency Phone Su,eys in around 80 countries. Phone sunfeys are cheap and easy to implement, but they have some major limitations, such as the absence of PoV
3、Crty data, sampling bias due to incomplete telephone coverage in many developing countries, and frequent nonresponses to phone interviews. To overcome these limitations, the World Bank conducted pilots in 20 countries where the SUrVey ofWellbeing via Instant and Frequent Tracking, a rapid povem, mon
4、itoring tool, was adopted to estimate poverty rates based on 10 to 15 simple questions collected via phone interviews, and where sampling weightswere adjusted to correct the sampling and nonresponse bias.This paper examines whether reweighting procedures andmethodology can eliminate the bias in povc
5、rtr estimation based on the COVID-19 High-Frequency Phone Surveys. Experiments using artificial phone survey samples show that (i) reweighting procedures cannot fully eliminate bias in povert estimates, as previous research has demonstrated, but (ii) when combined with SUrVey of Wellbeing Via Instan
6、t and Frequent Tracking PoVerty projections, they effectively eliminate bias in poverty estimates and otherstatistics.hispaperisaproductofthePovertyandEquityGlobalPractice.ItispartofalargereffortbytheWorldBanktoprovideopenaccesstoitsresearchandmakeacontributiontodevelopmentpolicydiscussionsaroundthe
7、world.PolicyResearchWorkingPapersarealsopostedontheWebatTheauthorsmaybecontactedatkzhang2worldbank.org.TbePolieyResearchWorkingPaperSeriesdisseminatestfjefindingsofuforkinprogresstoencouragetbeexchanfofideasaboutdeivlopmentissues.Anobecihfeoftheseriesisto般thefindingoutquickfy,evifthepresentationsare
8、lessthanJulbfpolished.ThepaperscanythenamesOftbeauthorsandshouldbecitedaccordingly.Thefinding,interpretations,andconclusionsexpressedinthispaperareentircbfthoseoftheaut!,wrs.TheydonotnecessarilyrfpnsvnttheviewsoftheInternationalBankforKecoftstnictionandDert,omenf/WorldBa欣anditsafftiate!oranifalions,
9、orthoseoftheFixecuthvDireetarsoftheWorldRankort!epivrtimeHtstheyrepresent.ProducedbytheResearchSupport,eamCorrectingSamplingandNonresponseBiasinPhoneSurveyPovertyKcxinZhang,ShinyaTakamatsuandNobuoYoshidaKeywords:Phonesurveys,Weighting,Povertyprojections/estimation,Correctionofsamplingbiasandnonrespo
10、nsebiasJELcodes:132,C83,C81*TheauthorswouldliketothankKristenHimelein,XueqiLi,AzizAramanov,ChristinaWieser,AnnaLUiSaPaffhausenf（）rtheirsupportf（）rthisstudy.Theauthorsalsogratefultopeerreviewers,KevinMcGeeandDanielGerszonMahler,andallparticipantsattheQualityEnhancementReviewmeetingheldattheWorldBanko
11、nNovember2021,UNECEConferenceofEuropeanStatisticians2022,andparticipantsatIARIWConference2022forhelpfulcomments.a）KexinZhang,SchoolofAgriculturalEconomicsandRuralDevelopment,RenminUniversityofChina,zhangkexin629ShinyaTakamatsu,PovertyandEquityGlobalPractice,WorldBank,stakamatsuworldbank.orgNobuoYosh
12、ida,PovertjrandEquityGlobalPractice,WorldBank,nyoshidaworldbank.orgI. IntroductionandbackgroundPhoneinterviewingopensnewpossibilitiesforempiricalresearchinsocialsciences.ItgreatlyreducesthecostsofconductingSUrVeySbecauseallcommunicationoccursWithOUttheface-to-faceinteractionCUStOmaryintraditionalsur
13、veys.WiththeoutbreakoftheCOVID-19pandemiclimitingface-to-faceinterviews,phoneSUrVeySaremoreprevalentamongacademicinstitutions,surveycompanies,andindividualresearchersforindividual-levelandhousehold-leveldatacollection.Totrackhouseholds,livingconditionsonatimelybasisduringapandemic,theWorldBanklaunch
14、edtheCOVID-19High-FrequencyPhoneSurveys(HFPS),whichhavebeencarriedoutinaround80countriessinceMarch2020.TheseSUrVeySallowpolicymakerstomonitorawidevarietyofsocioeconomicindicatorsinatimelyandfrequentmanner.Phonesurveyshaveshortcomings.First,itisdifficulttomonitorpovertyusingtheCOVID-19IIFPS.TheCOVID-
15、19HFPSdoesnotcollectconsumptionorincomedata,whicharenecessaformeasuringpovertyrandinequalityunderthetraditionalPOVCrtymonitoringapproach.Itistime-consuming,costly,andcomplextocollectsuchdata.Aninterviewermustaskhouseholdsanumberofcomplexquestionsregardingtheirrecentconsumption,expenditures,anddetail
16、edincomecomponents.Suchanintemewrequiresatleast30minutesanduptotwohours,evenbywell-trainedandqualifiedinterviewers.Itisalsochallengingtoadministertheintenriewindevelopingcountrieswheretelephoneconnectionsarenotalwaysstableenoughtocompletesuchalonginterview.AsolutiontoChallenge1:.SIF7F7asarapidpovertymonitoringtoo!InMarch2020,theWorldBanklaun
