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Brothers in Arms - An Experiment on the Alliance Puzzle


Changxia Ke


Max Planck Institute for Tax Law and Public Finance

Kai A. Konrad


Max Planck Institute for Tax Law and Public Finance; Social Science Research Center Berlin (WZB); Centre for Economic Policy Research (CEPR); CESifo (Center for Economic Studies and Ifo Institute for Economic Research); Institute for the Study of Labor (IZA)

Florian Morath


Max Planck Institute for Tax Law and Public Finance

January 2011

Working Paper of the Max Planck Institute for Tax Law and Public Finance No. 2011-04

Abstract:     
Our experimental analysis of alliances in conflicts leads to three main findings. First, even in the absence of repeated interaction, direct contact or communication, free-riding among alliance members is far less pronounced than what would be expected from non-cooperative theory. Second, this possible solidarity among "brothers in arms" when fighting against an outside enemy may rapidly deteriorate or disappear as soon as the outside enemy disappears. Third, when fighting an outside enemy, "brothers in arms" may already anticipate future internal conflict about dividing the spoils of winning; however, this subsequent internal conflict does not discourage alliance members from expending much effort in the contest against the external enemy.

Number of Pages in PDF File: 39

Keywords: Alliance, conflict, contest, free-riding, hold-up problem, solidarity

JEL Classification: D72, D74

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Date posted: December 30, 2010 ; Last revised: October 31, 2011

Suggested Citation

Ke, Changxia, Konrad, Kai A. and Morath, Florian, Brothers in Arms - An Experiment on the Alliance Puzzle (January 2011). Working Paper of the Max Planck Institute for Tax Law and Public Finance No. 2011-04. Available at SSRN: http://ssrn.com/abstract=1731828 or http://dx.doi.org/10.2139/ssrn.1731828

Contact Information

Changxia Ke
Max Planck Institute for Tax Law and Public Finance ( email )
Marstallplatz 1
Munich, 80539
Germany
Kai A. Konrad (Contact Author)
Max Planck Institute for Tax Law and Public Finance ( email )
Marstallplatz 1
Munich, 80539
Germany
HOME PAGE: http://www.tax.mpg.de/en/pub/home.cfm
Social Science Research Center Berlin (WZB) ( email )
Reichpietschufer 50
Berlin, 10785
Germany
HOME PAGE: http://www.wzb.eu/mp/fff/people/kai_konrad.en.htm
Centre for Economic Policy Research (CEPR)
90-98 Goswell Road
London, EC1V 7RR
United Kingdom
CESifo (Center for Economic Studies and Ifo Institute for Economic Research)
Poschinger Str. 5
Munich, 81679
Germany
Institute for the Study of Labor (IZA)
P.O. Box 7240
Bonn, 53072
Germany
Florian Morath
Max Planck Institute for Tax Law and Public Finance ( email )
Marstallplatz 1
Munich, 80539
Germany
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