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The Social Value of Public Information with Convex Costs of Information Acquisition

  • Ui, Takashi

In a beauty contest framework, welfare can decrease with public information if the precision of private information is exogenous, whereas welfare necessarily increases with public information if the precision is endogenous with linear costs of information acquisition. The purpose of this paper is to reconcile these results by considering nonlinear costs of information acquisition. The main result of this paper is a necessary and sufficient condition for welfare to increase with public information. Using it, we show that costs of information acquisition are linear if and only if welfare necessarily increases with public information. Thus, welfare can decrease with public information for any strictly convex costs. This is because convex costs mitigate the so-called crowding-out effect of public information on private information, thereby making the social value of public information with endogenous precision closer to that with exogenous precision.

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File URL: http://hermes-ir.lib.hit-u.ac.jp/rs/bitstream/10086/26604/3/070econDP14-05.pdf
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Paper provided by Graduate School of Economics, Hitotsubashi University in its series Discussion Papers with number 2014-05.

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Length: 9 p.
Date of creation: May 2014
Date of revision:
Handle: RePEc:hit:econdp:2014-05
Contact details of provider: Phone: +81-42-580-8000
Web page: http://www.econ.hit-u.ac.jp/

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  1. Hellwig, Christian & Veldkamp, Laura, 2007. "Knowing What Others Know: Coordination Motives in Information Acquisition," CEPR Discussion Papers 6506, C.E.P.R. Discussion Papers.
  2. David P. Myatt & Chris Wallace, 2012. "Endogenous Information Acquisition in Coordination Games," Review of Economic Studies, Oxford University Press, vol. 79(1), pages 340-374.
  3. Li, Lode & McKelvey, Richard D. & Page, Talbot, 1987. "Optimal research for cournot oligopolists," Journal of Economic Theory, Elsevier, vol. 42(1), pages 140-166, June.
  4. Jonathan G. James & Phillip Lawler, 2011. "Optimal Policy Intervention and the Social Value of Public Information," American Economic Review, American Economic Association, vol. 101(4), pages 1561-74, June.
  5. Camille Cornand & Frank Heinemann, 2008. "Optimal Degree of Public Information Dissemination," Economic Journal, Royal Economic Society, vol. 118(528), pages 718-742, 04.
  6. George-Marios Angeletos & Alessandro Pavan, 2007. "Efficient Use of Information and Social Value of Information," Econometrica, Econometric Society, vol. 75(4), pages 1103-1142, 07.
  7. Luca Colombo & Gianluca Femminis & Alessandro Pavan, 2014. "Information Acquisition and Welfare," Review of Economic Studies, Oxford University Press, vol. 81(4), pages 1438-1483.
  8. George-Marios Angeletos & Alessandro Pavan, 2004. "Transparency of Information and Coordination in Economies with Investment Complementarities," NBER Working Papers 10391, National Bureau of Economic Research, Inc.
  9. Stephen Morris & Hyun Song Shin, 2002. "Social Value of Public Information," American Economic Review, American Economic Association, vol. 92(5), pages 1521-1534, December.
  10. Colombo, Luca & Femminis, Gianluca, 2008. "The social value of public information with costly information acquisition," Economics Letters, Elsevier, vol. 100(2), pages 196-199, August.
  11. Vives, Xavier, 1988. "Aggregation of Information in Large Cournot Markets," Econometrica, Econometric Society, vol. 56(4), pages 851-76, July.
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