Hopkins Teppei Yamamoto Version 13 BETA May 16 2014 Designed as a companion to Causal Inference in Conjoint Analysis Understanding MultiDimensional Choices via Stated Preference Experiments by Hainmueller J D J Hopkins and T Yamamoto brPage 2br Cont ID: 70521
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3InstallationTherearetwowaystoruntheConjointSurveyDesignTool(SDT).3.1WindowsBinaryForWindowsusers,anexecutablebinaryisavailablefordownload.Thisisaself-containedpackagethatrequiresnoadditionallibrariestofunction.TousetheSDT,unziptheConjointSDTdirectorytothedesiredlocationandruntheconjointSDT.exeexecutablele.Asamplesurveyle,immigrant demo.sdt,isincludedintheDemosfolder.3.2SourcePackageMacOSXandLinuxusersdonothavestandaloneexecutablesandneedtousethePythonsourceles.WindowsuserswithaPythoninstallationcanalsousethesourcepackage.This,infact,isadvisableasthebinarypackageismuchlargerthanthesourcesinceitincludesthenecessaryPythonlibrariesandinterpreter.TheConjointSDTiswritteninPython2requiresPython2.7orgreater.ToobtainthemostrecentreleaseofPython2,visithttp://www.python.org/download/releases/2.7.5/MacOSXusersshouldmakesurethattheyhavetheTCL/TKlibraryinstalled.TheGUIli-braryusedbytheSDT,Tkinter,reliesonthistoolkit,whichtypicallydoesnotcomebundledwiththePythoninstalleronOSX.ToinstallTCL/TK,http://www.python.org/download/mac/tcltk/anddownloadtherecommendedTCL/TKpackageforthemostrecentreleaseofPython2.ToruntheConjointSDTfromPythonsource,unpacktheConjointSDTdirectorytothedesiredlocationandruntheconjointSDT.pylethroughthePythoninterpreter(thiscanbedonethroughthecommandlinebycallingpythonconjointSDT.py).Asamplesurveyle,immigrant demo.sdt,isincludedintheDemosfolder.3 Bydefault,eachlevelwithinanattributehasanequalprobabilityofselectionintotheprole.Tochangeaweight,selectalevelfromthepanelandclickEditWeight.Standardprobabilityconstraintsapply.Probabilitiesmustbebetween0and1andmustsumto1acrossalllevelswithinanattribute.Thesumacrossweightswithinanattributeisdisplayedabovethelevelspanel.Tosavetheweights,clickSaveWeights.Toresettheweightstothedefaultuniformrandomizationscheme,clickResetWeightstoDefault.Note:Ifattributesandlevelsaresubsequentlyaddedtothedesign,theweightedprobabilitieswillresettothedefault(uniformrandomization).Itisrecommendedthatyoudenealloftheattributesandlevelsthatyouwishtoincludeinyourdesignandthenaltertherandomizationweights.4.5AttributeOrderConstraintsIfyouchoosetorandomizetheorderinwhichattributesaredisplayedforeachrespondent,youmaystillwanttokeepsomeattributesinapre-denedordertoeasecomprehensionandimprovereadability.Forexample,youmaywanttogroupthematicallyrelatedattributestogether. Figure5:AttributeOrderConstraintWindowThiswindowallowsyoutodeneblocksofattributesthatwillalwaysbepresentedtorespon-dentsinthesameorder.TocreateanewblockclickNewConstraint.Todeleteanexisting9 -1-2-3":"computerprogrammer","F-1-2-4":"5+years","F-1-2-5":"interviewswithemployer","F-1-2-6":"male","F-1-2-7":"seekbetterjob","F-1-2-8":"highschool","F-1-2-9":"manytimesastourist","F-2-1":"Origin","F-2-1-1":"Iraq","F-2-2":"Language","F-2-1-2":"fluentEnglish","F-2-3":"Profession","F-2-1-3":"financialanalyst","F-2-4":"Jobexperience","F-2-1-4":"5+years","F-2-5":"Jobplans","F-2-1-5":"willlookforwork","F-2-6":"Gender","F-2-1-6":"female","F-2-7":"Applicationreason","F-2-1-7":"reunitewithfamily","F-2-8":"Education","F-2-1-8":"4thgrade","F-2-9":"PriortripstoU.S.","F-2-1-9":"sixmonthswithfamily","F-2-2-1":"Iraq","F-2-2-2":"brokenEnglish","F-2-2-3":"janitor","F-2-2-4":"1-2years","F-2-2-5":"noplanstolookforwork","F-2-2-6":"male","F-2-2-7":"escapepersecution","F-2-2-8":"4thgrade","F-2-2-9":"sixmonthswithfamily"}Thisoutputcanthenbefeddynamicallyintoyouronlinesurvey.5.1HowtoembedyourdesignintoaQualtricsquestionIfyouareusingtheQualtricssurveysoftware,itisveryeasytointegratethe.phpleyouhaveexportedwithyoursurvey ow.ThefollowinginstructionswillwalkyouthroughtheprocessofincorporatingyourconjointdesignintoaQualtricsquestion.1.Uploadthe.phpletoawebserver(makesurethatthewebserverhasPHPsupport).2.InyourQualtricscontrolpanel,navigatetotheSurveyFlow.3.Addanew\WebService"elementtothetopofyoursurvey ow.1Makesurethatthiselementisaboveyourquestionblocksinthesurvey ow.4.IntheURLeld,entertheaddressofyour.phpleandpress\TestURL."5.IftheURLissetcorrectly,apop-upwindowshouldappearcontainingalistofeldscorre-spondingtoyourattributes.Selectalloftheelds(clickon\all"intheupper-leftcorner) 1FormoreinformationonhowtocreateaWebServiceelement,seehttp://www.qualtrics.com/university/researchsuite/advanced-building/survey- ow/web-service/.11 Thisprogramisdistributedinthehopethatitwillbeuseful,butWITHOUTANYWAR-RANTY;withouteventheimpliedwarrantyofMERCHANTABILITYorFITNESSFORAPAR-TICULARPURPOSE.SeetheGNUGeneralPublicLicenseformoredetails.YoushouldhavereceivedacopyoftheGNUGeneralPublicLicensealongwiththisprogram.Ifnot,seehhttp://www.gnu.org/licenses/i.13