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The Effect of New Information Technologies on Asset Pricing Anomalies

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  • David Hirshleifer
  • Liang Ma

Abstract

We test and compare the effects of introduction of two new financial information technologies, EDGAR and XBRL, on well-known asset pricing anomalies often attributed to mispricing. EDGAR facilitates easier access to public accounting information about public firms; XBRL reduces the cost of processing such information. Using stacked difference-in-differences regressions, we find that both EDGAR and XBRL reduce mispricing for accounting-based anomalies but not for non-accounting-based anomalies. The economic magnitudes of the effects on accounting-based anomalies are similar for EDGAR and XBRL. These results suggest that both easier access to and less costly processing of public information enhance market efficiency.

Suggested Citation

  • David Hirshleifer & Liang Ma, 2024. "The Effect of New Information Technologies on Asset Pricing Anomalies," NBER Working Papers 32767, National Bureau of Economic Research, Inc.
    • Handle: RePEc:nbr:nberwo:32767
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    More about this item

    JEL classification:

    • 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
    • G4 - Financial Economics - - Behavioral Finance
    • G40 - Financial Economics - - Behavioral Finance - - - General
    • M40 - Business Administration and Business Economics; Marketing; Accounting; Personnel Economics - - Accounting - - - General

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