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From perception to action: An economic model of brain processes

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  • Brocas, Isabelle
  • Carrillo, Juan D.

Abstract

We build on research from neurobiology to model the process through which the brain maps outside evidence into decisions. The sensory system encodes information through cell-firing. Cell-firing is measured against a threshold, and an action is triggered depending on whether the threshold is surpassed. The decision system modulates the threshold. We show that the (constrained) optimal threshold is set in a way that existing beliefs are likely to be confirmed. We then derive behavioral implications. Our mechanism can explain in a unified framework a number of ‘anomalies’ noted in psychology and economics: (i) belief anchoring (the order in which evidence is received affects beliefs and choices); (ii) polarization (individuals with opposite priors may polarize their opinions after receiving identical evidence); (iii) payoff-dependence of beliefs and (iv) belief disagreement (individuals with identical priors who receive the same evidence may end up with different posterior beliefs).

Suggested Citation

  • Brocas, Isabelle & Carrillo, Juan D., 2012. "From perception to action: An economic model of brain processes," Games and Economic Behavior, Elsevier, vol. 75(1), pages 81-103.
    • Handle: RePEc:eee:gamebe:v:75:y:2012:i:1:p:81-103
    DOI: 10.1016/j.geb.2011.10.001
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    Cited by:

    1. Gonzalo Valdés-Edwards & Salvador Valdés-Prieto, 2013. "A Tractable Theory of Choice Based on Cell Behavior," CESifo Working Paper Series 4424, CESifo.
    2. Brocas, Isabelle & Carrillo, Juan D., 2016. "A neuroeconomic theory of memory retrieval," Journal of Economic Behavior & Organization, Elsevier, vol. 130(C), pages 198-205.
    3. Carlos Alós-Ferrer & Maximilian Mihm, 2021. "Updating stochastic choice," ECON - Working Papers 381, Department of Economics - University of Zurich.
    4. Landry, Peter, 2021. "A behavioral economic theory of cue-induced attention- and task-switching with implications for neurodiversity," Journal of Economic Psychology, Elsevier, vol. 86(C).
    5. Brocas, Isabelle & Carrillo, Juan D., 2014. "Dual-process theories of decision-making: A selective survey," Journal of Economic Psychology, Elsevier, vol. 41(C), pages 45-54.

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    More about this item

    Keywords

    Neuroeconomic theory; Information processing; Bayesian updating;
    All these keywords.

    JEL classification:

    • D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty
    • D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search; Learning; Information and Knowledge; Communication; Belief; Unawareness
    • D87 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Neuroeconomics

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