Kingmakers and Leaders in Coalition Formation

Assume that players strictly rank each other as coalition partners. We propose a procedure whereby they “fall back” on their preferences, yielding internally compatible, or coherent, majority coalition(s), which we call fallback coalitions. If there is more than one fallback coalition, the players common to them, or kingmakers, determine which fallback coalition will form. The players(s) who are the first to be acceptable to all other members of a fallback coalition are the leader(s) of that coalition. The effects of different preference assumptions—particularly, different kinds of single-peakedness—and of player weights on the number of coherent coalitions, their connectedness, and which players become kingmakers and leaders are investigated. The fallback procedure may be used (i) empirically to identify kingmakers and leaders or (ii) normatively to select them.


Issue Date:
2009-06
Publication Type:
Working or Discussion Paper
PURL Identifier:
http://purl.umn.edu/52337
Total Pages:
41
JEL Codes:
C71; C78; D72
Series Statement:
SD
41.2009




 Record created 2017-04-01, last modified 2017-08-25

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