離散選擇模型logit模型實例stata分析

ContentsIntroductionSPDatasetinformationModelingscenariossettingDatamodificationModelingestimatedresultsModelingcomparisonConclusion第一頁，共12頁。IntroductionThispaperdevelopedadisaggregatedlogisticsdemandmodelsusingdiscretechoiceanalysismethod.Datausedis2008-SPdatafromasurvey.Statawasemployedfortheestimationoflogitmodels.第二頁，共12頁。SPDatasetinformationStatedpointed:2007Analysiscommodity:steelAnalysisrange:30people(row600-1500)Dependentvariable:choiceIndependentvariables:cost[log(#/10^5)] time[hour] LOS[#/10]第三頁，共12頁。ModelingScenariosSettingModelingscenariosMarketSegment?YNMODEL1-1-Distance5/63variables(cost/time/LOS)MODEL2-1-Distance5/62variables(cost/time)MODEL3-1-Distance5/62variables(cost/LOS)MODEL4-1-Distance5/62variables(time/LOS)MODEL1-23variables(cost/time/LOS)MODEL2-22variables(cost/time)MODEL3-22variables(cost/LOS)MODEL4-22variables(time/LOS)第四頁，共12頁。DataModificationWemodifyrow-datatoremoveunreasonabledataset-Suchasthechoiceofthenot-dominantalternativeModel1has1unreasonabledatasets(inalldatasets)Model2has31unreasonabledatasets(inalldatasets)Model3has8unreasonabledatasets(inalldatasets)Model4has85unreasonabledatasets(inalldatasets)Model4isignored第五頁，共12頁。idmodedistanceqtypecosttimeloschoicelogcost5los2223rail51210000146000.7419376223truck5128000066011.0296196223rail5102100001910000.74193710223truck51028000076011.0296196Datareorganizeexampleiddistancequestiontyperailtruckchoicecosttimeloscosttimelos22351210000146028000066022235226000014803500007602BasicdataDataModification第六頁，共12頁。ModelingEstimatedResults(DIST5)Modeldistance51-1-50.28992-1-50.28843-1-50.1042第七頁，共12頁。ModelingEstimatedResults(DIST6)Modeldistance61-1-60.25882-1-60.25393-1-60.0704第八頁，共12頁。ModelingEstimatedResults(DIST5&6)ModelDistance5&61-20.25392-20.25213-20.0838第九頁，共12頁。ModelingComparison第十頁，共12頁。ConclusionThebestmodelisModel1-1Statisticalresultsoftheestimationindicatethatmarketsegmentationmakesthemodelmorecomprehensive.Themorevariablesmodelhas,themorecomprehensivemodelis.The