Cheap talk en dos dimensiones: condiciones necesarias y suficientes para que haya revelación perfecta en una dimensión

Luis Alberto Romero  Ibarra

doi:10.24201/ee.v24i2.121

48-vol. 24, no. 2, july-december, 2009

Articles

Two-dimensional cheap talk: Necessary and sufficient conditions for perfect revelation in one dimension

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Luis Alberto Romero Ibarra

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Luis Alberto Romero Ibarra
Secretaría de Hacienda y Crédito Público

DOI: https://doi.org/10.24201/ee.v24i2.121

Published 2009-07-01

Keywords

two dimensional,
perfect revealing equilibrium in the dimension of agreement

How to Cite

Romero Ibarra, L. A. (2009). Two-dimensional cheap talk: Necessary and sufficient conditions for perfect revelation in one dimension. Estudios Económicos De El Colegio De México, 24(2), 303–313. https://doi.org/10.24201/ee.v24i2.121

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Abstract

This paper develops a model of cheap talk à la Crawford and Sobel whose state variable takes values within the unit square. No characterization of all equilibria has been found. This paper focuses on equilibria where the Sender reveals all the information in the direction that is perpendicular to the vector of disagreement. The foremost result of this analysis states that there exists perfect revelation in this dimension if and only if the random state vector has components that are independent in the directions of agreement and disagreement.