Non-monotone social learning

    Research output: Working paperDiscussion paper


    We revisit the canonical binary-state model of social learning to investigate the possibility of non-monotone learning: ceteris paribus, with some predecessor(s) switching to actions that reveal greater confidence in one state of the world, agents nevertheless become more confident in the other. A necessary and sufficient condition for non-monotone learning is provided in an illustrative setting where agents are either uninformed or partially informed by binary private signals. In a general setting with continuous private signals, we obtain a sufficient condition for non-monotone learning that does not rely on the shape of the underlying information structures apart from a couple of simple boundary requirements. As a result, a social learning process that completes eventually can be well approximated in a way such that non-monotone learning and anti-imitation are bound to happen.
    Original languageEnglish
    Place of PublicationSt Andrews
    PublisherUniversity of St Andrews
    Number of pages30
    Publication statusPublished - 7 Dec 2020

    Publication series

    NameSchool of Economics and Finance Discussion Paper
    PublisherUniversity of St Andrews
    ISSN (Print)0962-4031
    ISSN (Electronic)2055-303X


    • Anti-imitation
    • Information structure
    • Social learning


    Dive into the research topics of 'Non-monotone social learning'. Together they form a unique fingerprint.

    Cite this