Template-type: ReDIF-Paper 1.0
Author-Name: Butler, Je
rey V. 
Author-Email: jeff.butler@eief.it 
Author-Name: Conzo, Pierluigi
Author-Email: pierluigi.conzo@unito.it
Author-Name: Leroch, Martin A. 
Author-Workplace-Name: University of Turin
Author-Workplace-Homepage: http://www.est.unito.it/
Title: Social Identity and Punishment.
Abstract: Third party punishment is crucial for sustaining cooperative behavior. Still, little is known about its determinants. 
In this paper we use laboratory experiments to investigate a long-conjectured interaction between group identication 
and bystanders' punishment preferences using a novel measure of these preferences. We induce minimal groups and 
give a bystander the opportunity to punish the perpetrator of an unfair act against a defenseless victim. 
We elicit the bystander's valuation for punishment in four cases: when the perpetrator, the victim, both or neither
are members of the bystander's group. 
We generate testable predictions about the rank order of punishment valuations from a simple framework incorporating 
group-contingent preferences for justice which are largely conrmed. Finally, we conduct control sessions where 
groups are not induced. Comparing punishment across treatment and control suggests that third-party punishers 
tend to treat others as in-group members unless otherwise divided. 
Length: 29 pages
Creation-Date: 2013-05
File-URL: http://www.est.unito.it/do/home.pl/Download?doc=/allegati/wp2013dip/wp_29_2013.pdf
File-Format: Application/PDF
Handle: RePEc:uto:dipeco:201329