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The disclosure function of the U.S. patent system: evidence from the PTDL program and extreme snowfall

Review of Accounting Studies 2023 28(1), 237-264 open access
Abstract Are retail investors using uncurated disclosures in form of patents for their investment decisions? This study uses the investment decisions of retail investors and variation in the local availability of patent information to answer this question. The variation comes from changes in the locations of U.S. Patent and Trademark Depository Libraries over time. I find a strong increase in the local trading volume of stocks after the release of a patent in counties that have easier access to patent information. In addition, trades made by retail investors with easier access to this information yield higher returns, compared to trades made by other investors. These results indicate that disclosures of the U.S. Patent and Trademark Office facilitate the dissemination of patent information to retail investors. Furthermore, these results suggest that retail investors complement traditional curated disclosures with uncurated disclosures in form of patents.

Analyst Coverage Overlaps and Interfirm Information Spillovers

Journal of Accounting Research 2021 59(4), 1425-1480 open access
ABSTRACT We offer a novel perspective on the role of sell‐side analysts as information intermediaries in capital markets by documenting a flow of information in a new direction, namely, from analysts to the firms they cover. We use analyst coverage overlaps and patent citations to examine analyst‐induced information spillovers about technology and industry trends. Consistent with analyst coverage–related information flows, firms are more likely to cite another firm's patent if that firm is covered by the same analyst. The effect varies with analysts' specialization, experience, and level of activity. Firms with more analyst‐based connections to peers also show greater corporate innovation. Collectively, our evidence indicates that financial analysts not only reduce information asymmetries between firms and capital market participants but also facilitate the production of business intelligence through feedback and interfirm information spillovers.