December 2010
IZA DP No. 5389: Self Selection Does Not Increase Other-Regarding Preferences among Adult Laboratory Subjects, but Student Subjects May Be More Self-Regarding than Adults
revised version published as 'Self-Selection and Variations in the Laboratory Measurement of Other-Regarding Preferences Across Subject Pools: Evidence From One College Student and Two Adult Samples' in: Experimental Economics, 2013, 16 (2), 170-189