Madden, G J Three predictions of the economic concept of unit price in a choice context. [electronic resource] - Journal of the experimental analysis of behavior Jan 2000 - 45-64 p. digital Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S. ISSN: 0022-5002 Standard No.: 10.1901/jeab.2000.73-45 doi Subjects--Topical Terms: AdultChoice BehaviorConditioning, OperantFemaleHumansMaleModels, EconomicMotivationSmoking--psychology