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Applied Panel Data Analysis for Economic and Social Surveys PDF

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Preview Applied Panel Data Analysis for Economic and Social Surveys

Applied Panel Data Analysis for Economic and Social Surveys Hans-Jürgen Andreß (cid:2) Katrin Golsch (cid:2) Alexander W. Schmidt Applied Panel Data Analysis for Economic and Social Surveys Hans-JürgenAndreß AlexanderW.Schmidt LehrstuhlfürEmpirischeSozial- LehrstuhlfürEmpirischeSozial- undWirtschaftsforschung undWirtschaftsforschung UniversitätKöln UniversitätKöln Cologne,Germany Cologne,Germany KatrinGolsch FakultätfürSoziologie UniversitätBielefeld Bielefeld,Germany AllnecessarydatasetsandStatasyntaxfilesonhttp://eswf.uni-koeln.de/panel ISBN978-3-642-32913-5 ISBN978-3-642-32914-2(eBook) DOI10.1007/978-3-642-32914-2 SpringerHeidelbergNewYorkDordrechtLondon LibraryofCongressControlNumber:2012953902 ©Springer-VerlagBerlinHeidelberg2013 Thisworkissubjecttocopyright.AllrightsarereservedbythePublisher,whetherthewholeorpartof thematerialisconcerned,specificallytherightsoftranslation,reprinting,reuseofillustrations,recitation, broadcasting,reproductiononmicrofilmsorinanyotherphysicalway,andtransmissionorinformation storageandretrieval,electronicadaptation,computersoftware,orbysimilarordissimilarmethodology nowknownorhereafterdeveloped.Exemptedfromthislegalreservationarebriefexcerptsinconnection with reviews or scholarly analysis or material supplied specifically for the purpose of being entered and executed on a computer system, for exclusive use by the purchaser of the work. Duplication of this publication or parts thereof is permitted only under the provisions of the Copyright Law of the Publisher’slocation,initscurrentversion,andpermissionforusemustalwaysbeobtainedfromSpringer. PermissionsforusemaybeobtainedthroughRightsLinkattheCopyrightClearanceCenter.Violations areliabletoprosecutionundertherespectiveCopyrightLaw. Theuseofgeneraldescriptivenames,registerednames,trademarks,servicemarks,etc.inthispublication doesnotimply,evenintheabsenceofaspecificstatement,thatsuchnamesareexemptfromtherelevant protectivelawsandregulationsandthereforefreeforgeneraluse. Whiletheadviceandinformationinthisbookarebelievedtobetrueandaccurateatthedateofpub- lication,neithertheauthorsnortheeditorsnorthepublishercanacceptanylegalresponsibilityforany errorsoromissionsthatmaybemade.Thepublishermakesnowarranty,expressorimplied,withrespect tothematerialcontainedherein. Printedonacid-freepaper SpringerispartofSpringerScience+BusinessMedia(www.springer.com) Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1 BenefitsandChallengesofthePanelDesign . . . . . . . . . . . . 2 1.1.1 Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1.2 Challenges . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.2 OutlineoftheBook . . . . . . . . . . . . . . . . . . . . . . . . . 12 1.3 AudienceandPrerequisites . . . . . . . . . . . . . . . . . . . . . 12 2 ManagingPanelData . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.1 TheNatureofPanelData . . . . . . . . . . . . . . . . . . . . . . 16 2.2 TheBasicsofPanelDataManagement . . . . . . . . . . . . . . . 19 2.2.1 MergingandAppendingData . . . . . . . . . . . . . . . . 20 2.2.2 BasicAppendandMergeCommands . . . . . . . . . . . . 23 2.2.3 BuildingaWorkingDataSetwithAppendandMerge Commands . . . . . . . . . . . . . . . . . . . . . . . . . . 25 2.2.4 WideandLongFormat . . . . . . . . . . . . . . . . . . . 27 2.2.5 SomeGeneralRemarks . . . . . . . . . . . . . . . . . . . 30 2.3 ThreeCaseStudiesonPovertyinGermany . . . . . . . . . . . . . 31 2.3.1 CaseStudy1:HowManyGermanCitizensWerePoor in2004?ACross-SectionalAnalysis . . . . . . . . . . . . 33 2.3.2 CaseStudy2:DidPovertyIncreaseinGermanyAfter 2004?AnAnalysisofPooledCross-Sections . . . . . . . . 40 2.3.3 CaseStudy3:HowLargeIstheRiskofBecomingPoor inGermany?APanelAnalysis . . . . . . . . . . . . . . . 42 2.4 HowtoRepresentaPopulationwithPanelData? . . . . . . . . . . 49 2.4.1 WeightedandUnweightedAnalysisofCross-Sections . . . 50 2.4.2 WeightinginBalancedandUnbalancedPanels . . . . . . . 52 2.4.3 WhentoUseWeights?. . . . . . . . . . . . . . . . . . . . 55 2.5 ConclusionandFurtherReading . . . . . . . . . . . . . . . . . . 58 3 DescribingandModelingPanelData . . . . . . . . . . . . . . . . . . 61 3.1 SomeBasicTerminology . . . . . . . . . . . . . . . . . . . . . . 62 3.2 MeasurementsoverTimeAreNotIndependent . . . . . . . . . . . 65 3.3 DescribingtheDependentVariable . . . . . . . . . . . . . . . . . 70 3.4 Explaining the Dependent Variable over Time: Typical ExplanatoryVariables . . . . . . . . . . . . . . . . . . . . . . . . 79 v vi Contents 3.4.1 Time-ConstantandTime-VaryingVariables . . . . . . . . 79 3.4.2 SeriallyCorrelatedObservations . . . . . . . . . . . . . . 83 3.5 ModelingPanelData. . . . . . . . . . . . . . . . . . . . . . . . . 86 3.5.1 ModelingtheLeveloftheDependentVariable . . . . . . . 87 3.5.2 ModelingChangeoftheDependentVariable . . . . . . . . 89 3.5.3 AdditionalModels . . . . . . . . . . . . . . . . . . . . . . 92 3.6 EstimatingModelsforPanelData . . . . . . . . . . . . . . . . . . 98 3.6.1 OmittedVariableBias(UnobservedHeterogeneity) . . . . 99 3.6.2 SeriallyCorrelatedandHeteroscedasticErrors . . . . . . . 107 3.6.3 MeasurementErrorBias . . . . . . . . . . . . . . . . . . . 109 3.6.4 AFormalSummaryoftheMainEstimationAssumptions . 114 3.7 OverviewofSubsequentChapters . . . . . . . . . . . . . . . . . . 116 4 PanelAnalysisofContinuousVariables . . . . . . . . . . . . . . . . 119 4.1 ModelingtheLevelofY . . . . . . . . . . . . . . . . . . . . . . . 120 4.1.1 IgnoringthePanelStructure . . . . . . . . . . . . . . . . . 121 4.1.2 ModelingthePanelStructure . . . . . . . . . . . . . . . . 126 4.1.3 Extensions . . . . . . . . . . . . . . . . . . . . . . . . . . 174 4.2 ModelingtheChangeofY . . . . . . . . . . . . . . . . . . . . . . 180 4.2.1 AnalysisofChangeUsingChangeScores . . . . . . . . . 180 4.2.2 AnalysisofChangeUsingImpactFunctions . . . . . . . . 185 4.2.3 AnalysisofTrends . . . . . . . . . . . . . . . . . . . . . . 192 4.3 ConclusionandFurtherReading . . . . . . . . . . . . . . . . . . 201 5 PanelAnalysisofCategoricalVariables . . . . . . . . . . . . . . . . 203 5.1 ModelingtheLevelofY:DiscreteResponseModels forPanelData . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204 5.1.1 IgnoringthePanelStructure . . . . . . . . . . . . . . . . . 206 5.1.2 ModelingthePanelStructure . . . . . . . . . . . . . . . . 227 5.1.3 Extensions . . . . . . . . . . . . . . . . . . . . . . . . . . 247 5.2 ModelingtheChangeofY:Discrete-TimeEventHistoryModels forPanelData . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248 5.2.1 BasicTerminology . . . . . . . . . . . . . . . . . . . . . . 251 5.2.2 HowtoEstimateaDiscrete-TimeHazardModel . . . . . . 254 5.2.3 ApplyingtheDiscrete-TimeEventHistoryModel . . . . . 262 5.2.4 Extensions . . . . . . . . . . . . . . . . . . . . . . . . . . 281 5.3 ConclusionandFurtherReading . . . . . . . . . . . . . . . . . . 284 6 HowtoDoYourOwnPanelAnalysis . . . . . . . . . . . . . . . . . . 287 7 UsefulBackgroundInformation . . . . . . . . . . . . . . . . . . . . . 293 7.1 FunctionsofRandomVariables . . . . . . . . . . . . . . . . . . . 293 7.2 EstimationandTesting. . . . . . . . . . . . . . . . . . . . . . . . 295 7.2.1 OrdinaryLeastSquares . . . . . . . . . . . . . . . . . . . 295 7.2.2 MaximumLikelihood . . . . . . . . . . . . . . . . . . . . 307 7.3 WebSiteoftheTextbook . . . . . . . . . . . . . . . . . . . . . . 312 Contents vii References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319 AuthorIndex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325 List of Figures Fig.1.1 Successful interviews with persons and households (SOEP: SamplesAandB) . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Fig.2.1 Appendingdata . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Fig.2.2 Mergingdatawithonekeyvariable . . . . . . . . . . . . . . . . 21 Fig.2.3 Mergingdatawithtwokeyvariables . . . . . . . . . . . . . . . . 22 Fig.2.4 Many-to-onemerge . . . . . . . . . . . . . . . . . . . . . . . . . 22 Fig.2.5 UnweightedGermanpovertyrates(2004–2006) . . . . . . . . . . 42 Fig.2.6 WeightedandunweightedGermanpovertyrates(2004–2006) . . 52 Fig.3.1 Survivalprobabilitybyincomelevel . . . . . . . . . . . . . . . . 73 Fig.3.2 Incometrajectoriesof19individualswithveryhighandverylow wages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 Fig.3.3 Explainingpaneldata . . . . . . . . . . . . . . . . . . . . . . . . 80 Fig.3.4 Impactfunctions . . . . . . . . . . . . . . . . . . . . . . . . . . 90 Fig.3.5 Loghourlywagesbylaborforceexperienceandeducation . . . . 101 Fig.3.6 Pathdiagramofhourlywages . . . . . . . . . . . . . . . . . . . 112 Fig.4.1 Residuals(connectedbylines)foreachoftenindividuals . . . . . 125 Fig.4.2 GovernmentspendinginIrelandandSweden(1961–1993) . . . . 137 Fig.4.3 Explainingbetweenandwithinvariance(uncorrelatedu ). . . . . 161 i Fig.4.4 Explainingbetweenandwithinvariance(correlatedu ) . . . . . . 161 i Fig.4.5 Demeaningparameterθ withrespecttonumber ofmeasurementsT . . . . . . . . . . . . . . . . . . . . . . . . . 172 Fig.4.6 PathdiagramofaRE(left)andaFEmodel(rightpanel) . . . . . 179 Fig.4.7 Meanlifesatisfactionbeforeandafterseparation . . . . . . . . . 186 Fig.5.1 ScatterplotsofacontinuousanddichotomousY . . . . . . . . . 208 Fig.5.2 Observedresponsesandpredictedprobabilityofsecondaryjob holding(pooledLPM) . . . . . . . . . . . . . . . . . . . . . . . 211 Fig.5.3 Thelogisticregressionfunction . . . . . . . . . . . . . . . . . . 215 Fig.5.4 Conditionaleffectsplotusingtheestimatesofthepooledlogistic model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223 Fig.5.5 Linearprobability,logisticandprobitregressionmodel . . . . . . 226 Fig.5.6 Differenttypesofcensoring . . . . . . . . . . . . . . . . . . . . 252 Fig.5.7 Predicted hazard rate of female retirement (using estimates ofmodel1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266 Fig.5.8 True and observed hazard rate of dying for the control andtreatmentgroup . . . . . . . . . . . . . . . . . . . . . . . . . 268 ix x ListofFigures Fig.5.9 Observedhazardrateof dyingforthetreatmentandcontrol group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270 Fig.5.10 Predictedhazardofretiring . . . . . . . . . . . . . . . . . . . . . 273 Fig.7.1 ExamplewithtwocontinuousvariablesXandY . . . . . . . . . 295 Fig.7.2 Empiricalsamplingdistributionofβ . . . . . . . . . . . . . . . 299 1 Fig.7.3 Howtochoosebetweendifferentestimators . . . . . . . . . . . . 300 Fig.7.4 Drawing inferences from a sample about an unknown population . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302 Fig.7.5 Loglikelihoodfunction(β varied,β fixedatβ =−1.4606) . . 309 1 0 0 List of Tables Table1.1 Familysize-adjustedincometransitiontablesforUSAmerican familieswithchildren(using40,50and60percentofmedian income) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Table2.1 Organizingpaneldatainadataset . . . . . . . . . . . . . . . . 17 Table2.2 Pooledcross-sections . . . . . . . . . . . . . . . . . . . . . . . 41 Table2.3 Responsepatternsinunbalancedpaneldata . . . . . . . . . . . 44 Table2.4 PovertydynamicsinGermany(2004–2006,unweighteddata) . . 48 Table2.5 PovertydynamicsinGermany(2004–2006,weighteddata) . . . 55 Table3.1 Loghourlywages1980–1987 . . . . . . . . . . . . . . . . . . . 66 Table3.2 Unionmembership1980–1987(frequenciesandpercentages) . . 68 Table3.3 Sequencesofunionmembershipstatus1980–1983 . . . . . . . 71 Table3.4 Survivalprobabilityofunionmembersfrom1980 . . . . . . . . 72 Table3.5 Loghourlywagesforselectedindividuals1980–1987 . . . . . . 75 Table3.6 Descriptivestatisticsofselectedvariables . . . . . . . . . . . . 81 Table3.7 Loghourlywages1980–1987(demeaneddata) . . . . . . . . . 84 Table3.8 Threedifferentprototypicalcorrelationstructures . . . . . . . . 85 Table3.9 Unionmembershipstatus1985bymembershipstatus1984 . . . 105 Table3.10 Unionmembershipstatus1981bymembershipstatus1980 . . . 111 Table4.1 Determinantsofloghourlywages:PooledOLS(1980–1987) . . 122 Table4.2 SerialcorrelationsinpooledOLSmodelandinrawdata . . . . 124 Table4.3 Determinantsofpublicspending:PooledOLS(1961–1993, 15OECDcountries) . . . . . . . . . . . . . . . . . . . . . . . . 130 Table4.4 Determinants of public spending: LSDV (1961–1993, 15OECDcountries) . . . . . . . . . . . . . . . . . . . . . . . . 132 Table4.5 Determinantsofpublicspending:FE(1961–1993,15OECD countries) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139 Table4.6 Determinants of log hourly wages: Pooled OLS and FE (1980–1987) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 Table4.7 CorrelationoftheresidualsfromtheFEmodel . . . . . . . . . . 145 Table4.8 Determinants of psychological distress: Pooled OLS, FE, andRE(1980–1992) . . . . . . . . . . . . . . . . . . . . . . . 150 Table4.9 CorrelationoftheresidualsfromthepooledOLSmodel . . . . . 151 Table4.10 CorrelationoftheresidualsfromtheREmodel . . . . . . . . . 156 Table4.11 Determinantsofpsychologicaldistress:FE,RE,pooledOLS, andBE(1980–1992) . . . . . . . . . . . . . . . . . . . . . . . 159 xi xii ListofTables Table4.12 Determinants of psychological distress: Hybrid models (1980–1992) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166 Table4.13 Change in overall life satisfaction due to separation (FDestimation) . . . . . . . . . . . . . . . . . . . . . . . . . . 183 Table4.14 Lifesatisfactionbeforeandafterseparation(RE,FE,andFD estimation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188 Table4.15 Psychologicaldistressbeforeandafterdivorce . . . . . . . . . . 192 Table4.16 Determinantsofpost-materialism(1984–1996)(FGLSandML estimates) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 Table5.1 Measuresusedintheanalysisoftheheineck-schwarze data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207 Table5.2 Transitionsbetweenpanelwaves . . . . . . . . . . . . . . . . . 209 Table5.3 Determinantsofsecondaryjobholding(pooledLPM) . . . . . . 210 Table5.4 CorrelationofresidualsfromthepooledLPM . . . . . . . . . . 212 Table5.5 Determinants of secondary job holding (pooled LPM withrobuststandarderrors) . . . . . . . . . . . . . . . . . . . . 213 Table5.6 Determinantsofsecondaryjobholding(pooledlogisticmodel) . 221 Table5.7 Determinantsofsecondaryjobholding(oddsratiosforpooled logisticmodel). . . . . . . . . . . . . . . . . . . . . . . . . . . 222 Table5.8 Determinants of secondary job holding (pooled linear probability, logistic, and probit model with cluster robust standarderrors) . . . . . . . . . . . . . . . . . . . . . . . . . . 225 Table5.9 Determinantsofsecondaryjobholding(pooledandFElogistic model) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235 Table5.10 Determinantsofsecondaryjobholding(RElogisticandRE probitmodel) . . . . . . . . . . . . . . . . . . . . . . . . . . . 241 Table5.11 Determinantsofsecondaryjobholding(RElogistichybrid model) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246 Table5.12 Measuresusedintheanalysisofthehankdata . . . . . . . . . 250 Table5.13 Hypothetical data set for estimating discrete-time event historydata . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259 Table5.14 Determinants of female retirement (discrete-time logistic hazardmodel) . . . . . . . . . . . . . . . . . . . . . . . . . . . 264 Table5.15 Determinantsoffemaleretirement(resultsofcompetingmodel specifications) . . . . . . . . . . . . . . . . . . . . . . . . . . . 265 Table5.16 Truehazardrates . . . . . . . . . . . . . . . . . . . . . . . . . 268 Table5.17 Determinantsoffemaleretirement(logisticandRElogistic hazardmodel) . . . . . . . . . . . . . . . . . . . . . . . . . . . 272 Table5.18 Women’sretirementbyhomeownership(inpercent) . . . . . . 276 Table5.19 Homeownershipbywomen’sretirement(inpercent) . . . . . . 277 Table5.20 Determinantsoffemaleretirement(complementarylog–log hazardmodel) . . . . . . . . . . . . . . . . . . . . . . . . . . . 282 Table6.1 Characteristicsofselectedpanelstudies . . . . . . . . . . . . . 288 Table7.1 Expectedvaluesandvariancesforfunctionsofrandomvariables 294 Table7.2 ExamplewithtwocontinuousvariablesXandY . . . . . . . . . 295

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