title: Issues in exploring variation in childhood socioeconomic gradients by age: a response to Case, Paxson, and Vogl.
authors.affiliation: Department of Psychology, University of British Columbia, 2136 West Mall, Vacouver, BC, Canada V6T 1Z4. echen@psych.ubc.ca <echen@psych.ubc.ca>
authors.forename: Edith
authors.initials: E
authors.lastname: Chen
authors.forename: Andrew D
authors.initials: AD
authors.lastname: Martin
authors.forename: Karen A
authors.initials: KA
authors.lastname: Matthews
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D006304:Health Status; D006801:Humans; D017063:Outcome Assessment, Health Care; D012923:Social Class