BEGIN:VCALENDAR PRODID:-//Grails iCalendar plugin//NONSGML Grails iCalendar plugin//EN VERSION:2.0 CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VEVENT DTSTAMP:20260408T064227Z DTSTART;TZID=Australia/Melbourne:20170920T120000 DTEND;TZID=Australia/Melbourne:20170920T130000 SUMMARY:In-group bias in prison UID:20260408T080249Z-iCalPlugin-Grails@philevents-web-f5d4878dd-r5qzs TZID:Australia/Melbourne LOCATION:20 Chancellors Walk\, Monash University\, Clayton\, Melbourne\, Australia DESCRIPTION:

Abstract: We conduct a field experiment in a typical Chinese jail to examine in-group bias within groups holding a stigmatized identity. Inmates are provided with an opportunity to work for a charity. We find evidence of both pro-sociality and in-group favoritism among prisoners. Inmates increase their effort when their productivity is associated with a charitable contribution. They work harder when the beneficiary carries the prisoner identity\, indicating the existence of in-group favoritism. On the other hand\, increased duration of \;incarceration weakens the inmates&rsquo\; in-group favoritism. Inmates who have remained in prison longer are less likely to try to help an in-group member\, yet this negative effect is not observed when the beneficiary is an outsider. We argue that negative in-group interaction among inmates explains this effect. Our findings highlight the importance of social interaction in the formation of in-group bias.

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