Multiple Referrals and Multidimensional Cheap Talk
AbstractCheap talk games have been widely used to analyze situations in which a policy maker needs expert advice. In previous work, agent uncertainty has almost always been modeled using a single-dimensional state variable. In this paper we prove that the dimensionality of the uncertain variable has an important qualitative impact on results and yields interesting insights into the 'mechanics' of information transmission. Contrary to the unidimensional case, with more than one dimension full transmission of information in all states of nature is typically possible, provided a very simple and intuitive condition is satisfied. When utilities are quadratic and there are simultaneous reports, linear independence of senders' ideal points is a sufficient condition to guarantee full revelation; with sequential reports, linear independence and a simple condition on the gradients of senders' utilities at the receiver's ideal point are sufficient. In particular as an application of the theory we are able to explain an empirical puzzle related to informational theories of legislative organization. These theories predict that legislative committees (senders) should have strong alignment of preferences with the Floor; but this doesn't fit with empirical facts. We prove that what really matters in transmission of information is the local behavior of the utilities of the senders at the ideal point of the policy maker (receiver), not the distances between the ideal points of players. We interpret this as an argument in support of informational theories of legislative organizations.
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Bibliographic InfoPaper provided by Econometric Society in its series Econometric Society World Congress 2000 Contributed Papers with number 1557.
Date of creation: 01 Aug 2000
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Other versions of this item:
- Marco Battaglini, 2002. "Multiple Referrals and Multidimensional Cheap Talk," Econometrica, Econometric Society, vol. 70(4), pages 1379-1401, July.
- Marco Battaglini, 1999. "Multiple Referrals and Multidimensional Cheap Talk," Discussion Papers 1295, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
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- Farrell, J. & Gibbons, R., 1989.
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e-89-7, Hoover Institution, Stanford University.
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Levine's Working Paper Archive
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- Austen-Smith David, 1993. "Interested Experts and Policy Advice: Multiple Referrals under Open Rule," Games and Economic Behavior, Elsevier, vol. 5(1), pages 3-43, January.
- Vijay Krishna & John Morgan, 1999.
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154, Princeton University, Woodrow Wilson School of Public and International Affairs, Discussion Papers in Economics..
- Daniel Diermeier & Timothy J. Feddersen, 1998. "Information and Congressional Hearings," Discussion Papers 1236, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
- repec:pri:wwseco:154 is not listed on IDEAS
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