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We study how the distribution of other-regarding preferences develops with age. Based on a set of allocation choices, we classify each of 717 subjects, aged 8 to 17 years, as either egalitarian, altruistic, or spiteful. We find a strong decrease in spitefulness with increasing age. Egalitarianism becomes less frequent, and altruism much more prominent, with age. Females are more frequently classified as egalitarian than males, and less often as altruistic. By varying the allocation recipient as either an in-group or an out-group member, we also study how parochialism develops with age. Parochialism emerges significantly in the teenage years. Based on a set of allocation choices, we classify each of 717 subjects, aged 8 to 17 years, as either egalitarian, altruistic, or spiteful. We find a strong decrease in spitefulness with increasing age. Egalitarianism becomes less frequent, and altruism much more prominent, with age. Females are more frequently classified as egalitarian than males, and less often as altruistic. By varying the allocation recipient as either an in-group or an out-group member, we also study how parochialism develops with age. Parochialism emerges significantly in the teenage years.

Gender differences in the willingness to compete have been identified as one important factor in explaining gender differences in labor markets and within organizations. We present three experiments with a total of 1,570 subjects, ages three to 18 years, to investigate the origins of this gender gap. In a between-subjects design we find that boys are more likely to compete than girls as early as kindergarten and that this gap prevails throughout adolescence. Re-examining the behavior of 316 subjects in a within-subjects design two years later, we show that these gender differences also largely persist over a longer time period and can thus be considered stable. Controlling for subjects' abilities in the different tasks, their risk attitudes, and expected performance, the gender gap in the willingness to compete is estimated in the range of 10–20 percentage points. We discuss the implications of our findings for policy interventions and organizational management. Data, as supplemental material, are available at http://dx.doi.org/10.1287/mnsc.2014.1981 . This paper was accepted by Uri Gneezy, behavioral economics.

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Standard-Nutzungsbedingungen:Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden.Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen.Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, gelten abweichend von diesen Nutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte.