Flaunt the imperfections: information, entanglements, and the regulation of London’s Alternative Investment Market

Philip Roscoe, Paul Willman

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    Abstract

    The literature on financial market design is predicated on the efficient market hypothesis (EMH), advocating transparency, liquidity, and universal information with a view to capturing efficient prices. We provide a counterfactual: the 1995 formation of AIM, the London Stock Exchange’s junior market. AIM employs an alternative mode of market organization based on market imperfections. Our empirical study shows how AIM draws on reputation, social relationships and practitioner knowledge to organise market governance. We argue that the market’s design should be understood as capable of producing informationally efficient prices. We characterize AIM as having a ‘Whitean’ structure, compared with the ‘Fama’ structure of main markets. We conclude that the ‘Whitean’ producer market is a viable design option for financial markets.
    Original languageEnglish
    Pages (from-to)565-589
    Number of pages25
    JournalEconomy and Society
    Volume50
    Issue number4
    Early online date18 Aug 2021
    DOIs
    Publication statusPublished - 2021

    Keywords

    • Market design
    • Efficient market hypothesis
    • Harrison White
    • Alternative Investment Market (AIM)
    • Market imperfections

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