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Are We Better-off for Working Hard?

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Abstract

When traders are uncertain on being informed and make effort to reduce their uncertainty, we would expect an improvement in both the welfare and price efficiency. By considering the disutility of the effort, we characterize the non-cooperative information game on traders' decision of making effort through a Nash equilibrium and asset price through a noisy rational expectation equilibrium. We show that making effort to be informed is harmful for social welfare. Also improving market efficiency is always at the cost of welfare reduction. Therefore, with the disutility of making effort to reduce the uncertainty on being informed, social welfare can be improved when traders make less effort, and more importantly, social welfare and price efficiency cannot be improved simultaneously.

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  • Xue-Zhong He & Lei Shi & Marco Tolotti, 2018. "Are We Better-off for Working Hard?," Research Paper Series 391, Quantitative Finance Research Centre, University of Technology, Sydney.
    • Handle: RePEc:uts:rpaper:391
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    File URL: https://www.uts.edu.au/sites/default/files/article/downloads/rp391.pdf
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    1. Mattsson, Lars-Goran & Weibull, Jorgen W., 2002. "Probabilistic choice and procedurally bounded rationality," Games and Economic Behavior, Elsevier, vol. 41(1), pages 61-78, October.
    2. Admati, Anat R, 1985. "A Noisy Rational Expectations Equilibrium for Multi-asset Securities Markets," Econometrica, Econometric Society, vol. 53(3), pages 629-657, May.
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    JEL classification:

    • G02 - Financial Economics - - General - - - Behavioral Finance: Underlying Principles
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading

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