The Roman Metro Problem
In Rome, if you start digging, chances are you will nd things. We consider a famous complaint that justi es the underdeveloped Roman metro system: \if we tried to build a new metro line, it would probably be stopped by archeological nds that are too valuable to destroy, so we would have wasted the money." Although this statement appears to be self-contradictory, we show that it can be rationalized in a voting model with diverse constituents. Even when there is a majority preference for a metro line, and discovery of an antiquity has the character of a positive option, a majority may oppose construction. We give sucient conditions for this ineciency to occur. One might think it arises from the inability to commit to nishing the metro (no matter what is discovered in the process). We show, however, that the inecient choice is made in voting over immediate actions precisely when there is no Condorcet winner in voting over contingent plans with commitment. Hence, surprisingly, commitment cannot really solve the problem. Our results extend to other common dynamic voting scenarios, such as the academic job market, which share the essential features of the Roman metro game.
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- William Jack & Roger Lagunoff, 2003.
Wallis Working Papers
WP36, University of Rochester - Wallis Institute of Political Economy.
- William Jack & Roger Lagunoff, 2003. "Dynamic Enfrachisement," Working Papers gueconwpa~03-03-03, Georgetown University, Department of Economics.
- Roger Lagunoff & William Jack, 2004. "Dynamic Enfranchisement," Econometric Society 2004 North American Summer Meetings 24, Econometric Society.
- William Jack & Roger Lagunoff, 2003. "Dynamic Enfranchisement," Public Economics 0306002, EconWPA, revised 01 Jul 2003.
- William Jack & Roger Lagunoff, 2003. "Dynamic Enfranchisement," Levine's Bibliography 666156000000000030, UCLA Department of Economics.
- Roger Lagunoff & William Jack, 2004. "Dynamic Enfranchisement," 2004 Meeting Papers 466, Society for Economic Dynamics.
- Barbera, S. & Maschler, M. & Shalev, J., 2001.
"Voting for Voters: A Model of Electoral Evolution,"
Games and Economic Behavior,
Elsevier, vol. 37(1), pages 40-78, October.
- BARBERA, Salvador & MASCHLER, Michael & SHALEV, Jonathan, 1998. "Voting for voters: a model of electoral evolution," CORE Discussion Papers 1998022, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
- Salvador Barberà & Michael Maschler & Jonathan Shalev, 1998. "Voting for Voters: A Model of Electoral Evolution," Game Theory and Information 9804001, EconWPA.
- B. Douglas Bernheim & Sita Nataraj Slavov, 2007.
"A Solution Concept for Majority Rule in Dynamic Settings,"
07-029, Stanford Institute for Economic Policy Research.
- B. D. Bernheim & S. N. Slavov, 2009. "A Solution Concept for Majority Rule in Dynamic Settings," Review of Economic Studies, Oxford University Press, vol. 76(1), pages 33-62.
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