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1、Session:SmartTools,SmartWorkCHI2013:ChangingPerspectives,Paris,FranceLaborDynamicsinaMobileMicro-TaskMarketMohamedMusthag,DeepakGanesanDepartmentofComputerScienceUniversityofMassachusetts,Amherst,MA01003{musthag,dganesan}@cs.umass.edu‘PlatformTasksFieldAgent[2]Pricechecks,ServiceAss
2、ess-ABSTRACTment,Photography,Verifica-Theubiquityofsmartphoneshasledtotheemergenceofmo-tion,PropertyEvaluationbilecrowdsourcingmarkets,wheresmartphoneuserspartic-Gigwalk[3]Datacollection,Photography,ipatetoperformtasksinthephysicalworld.Mobilecrowd-FocusGroups,StoreAudits,IT,sourcing
3、marketsareuniquelydifferentfromtheironlineFinancialServicescounterpartsinthattheyrequirespatialmobility,andareNeighborFavor[4]Deliveries,Rides,GroceriesthereforeimpactedbygeographicfactorsandconstraintsthatTaskRabbit[5]OddErrands,Groceries,Mov-arenotpresentintheonlinecase.Despitethe
4、emergenceing,Deliveries,Cleaningandimportanceofsuchmobilemarketplaces,littletononeWeGoLook[6]VerifyProperties,Automobiles,isknownaboutthelabordynamicsandmobilitypatternsofDates,Boats,HeavyEquipmentagents.beforepurchaseThispaperprovidesanin-depthexplorationoflabordynam-Table1.SomeAct
5、iveMobileCrowdsourcingPlatformsicsinmobiletaskmarketsbasedonayear-longdatasetfromaleadingmobilecrowdsourcingplatform.Wefindthatasmallcoregroupofworkers(<10%)accountforadisproportion-GeneralTermsatelylargeproportionofactivity(>80%)generatedintheHumanFactors;Measurement.market.Wefindtha
6、tthesesuperagentsaremoreefficientthanotheragentsacrossseveraldimensions:a)theyarewill-INTRODUCTIONingtomovelongerdistancestoperformtasks,yettheyamor-Thepastdecadehasseenunprecedentedgrowthinsmart-tizetravelacrossmoretasks,b)theyworkandsearchfortasksphones,withmillionsofthesedevicesbe
7、comingfirst-classmoreefficiently,c)theyhavehigherdataqualityintermsofcitizensoftheInternet.Thegrowingsmartphoneuserbaseacceptedsubmissions,andd)theyimproveinalmostallofhasenablednewpaidmobilecrowdsourcingmarketplaces,theseefficiencymeasuresovertime.Wefindthatsuperagentwhereindividualsar
8、epaidtoperformtasks
