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1、HEALTHECONOMICSHealthEcon.(2011)PublishedonlineinWileyOnlineLibrary(wileyonlinelibrary.com).DOI:10.1002/hec.1736QUANTILEREGRESSIONANALYSISOFBODYMASSANDWAGESa,bMELIYANNIJOHARandHAJIMEKATAYAMAaCentreforHealthEconomicsResearchandEvaluation,UniversityofTechnology,Sydney,AustraliabWasedaUniversit
2、y,Tokyo,JapanSUMMARYUsingtheNationalLongitudinalSurveyofYouth1979,weexploretherelationshipbetweenbodymassandwages.Weusequantileregressiontoprovideabroaddescriptionoftherelationshipacrossthewagedistribution.Wealsoallowtherelationshiptovarybythedegreeofsocialskillsinvolvedindifferentjobs.Ourres
3、ultsfindthatforfemaleworkersbodymassandwagesarenegativelycorrelatedatallpointsintheirwagedistribution.Thestrengthoftherelationshipislargerathigher-wagelevels.Formaleworkers,therelationshipisrelativelyconstantacrosswagedistributionbutheterogeneousacrossethnicgroups.Whencontrollingfortheendogene
4、ityofbodymass,wefindthatadditionalbodymasshasanegativecausalimpactonthewagesofwhitefemalesearningmorethanthemedianwagesandofwhitemalesaroundthemedianwages.Amongtheseworkers,thewagepenaltiesarelargerforthoseemployedinjobsthatrequireextensivesocialskills.Thesefindingsmaysuggestthatlabormarketsrew
5、ardwhiteworkersforgoodphysicalshapedifferently,dependingonthelevelofwagesandthetypeofjobaworkerhas.Copyrightr2011JohnWiley&Sons,Ltd.Received30April2009;Revised9March2010;Accepted10March2011KEYWORDS:wages;bodymassindex;quantileregression;endogeneity1.INTRODUCTION1TheUnitedStatesisoneofthefatte
6、stnationsintheworld.TheproportionofAmericanswhoareclassifiedasobesehasmorethandoubledinthepast25yearstoalmostathird,whilethelateststatisticsrevealthattwo-thirdsofthepopulationareclassifiedasatleastoverweight(NIH,2004;WHO,2004).Thisrapidgrowthinthenation’sbodyweightentailsnotonlyhealthproblemsbu
7、talsosignificanteconomiccosts.Excessivebodyweighthasbeenlinkedtonumeroushealthdiseases,suchascardiovasculardisease,diabetes,andsomeformsofcancer,allofwhichrequiretreatmentsinvolvingextensivemedicalcosts.Obesity-relatedhealthproblems,forinstanc
