title: 'Gateway effects': insights from economics are needed.
authors.affiliation: Department of Policy Analysis and Management, Cornell University, Ithaca, NY 14853, USA. dsk10@cornell.edu
authors.forename: Donald S
authors.initials: DS
authors.lastname: Kenkel
authors.forename: Alan D
authors.initials: AD
authors.lastname: Mathios
mesh_terms: D000293:Adolescent; D000328:Adult; D006801:Humans; D002189:Marijuana Abuse / Q000191:economics* / Q000523:psychology; D008960:Models, Psychological; D019966:Substance-Related Disorders / Q000191:economics / Q000523:psychology