Multiple Referrals and Multidimensional Cheap Talk
Cheap 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.
|Date of creation:||01 Aug 2000|
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- Daniel Diermeier & Timothy J. Feddersen, 1998. "Information and Congressional Hearings," Discussion Papers 1236, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
- Vijay Krishna & John Morgan, 1999.
"A Model of Expertise,"
Game Theory and Information
- Krishna, V. & Morgan, J., 1999. "A Model of Expertise," Papers 206, Princeton, Woodrow Wilson School - Public and International Affairs.
- Vijay Krishna & John Morgan, 1999. "A Model of Expertise," Working Papers 154, Princeton University, Woodrow Wilson School of Public and International Affairs, Discussion Papers in Economics..
- Crawford, Vincent P & Sobel, Joel, 1982.
"Strategic Information Transmission,"
Econometric Society, vol. 50(6), pages 1431-51, November.
- Paul R. Milgrom & John Roberts, 1985.
"Relying on the Information of Interested Parties,"
Cowles Foundation Discussion Papers
749, Cowles Foundation for Research in Economics, Yale University.
- Farrell, Joseph & Gibbons, Robert, 1989.
"Cheap Talk with Two Audiences,"
American Economic Review,
American Economic Association, vol. 79(5), pages 1214-23, December.
- 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.
- Baliga, Sandeep, 1999. "Monitoring and Collusion with "Soft" Information," Journal of Law, Economics and Organization, Oxford University Press, vol. 15(2), pages 434-40, July.
- Epstein, David, 1998. "Partisan and Bipartisan Signaling in Congress," Journal of Law, Economics and Organization, Oxford University Press, vol. 14(2), pages 183-204, October.
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