Calendar rotations: A new approach for studying the impact of timing using earnings announcements

We develop a novel methodology for studying the causal impact of announcement timing. Our methodology uses firms’ earnings announcements and leverages quasi-exogenous variation attributable to the specific day-of-week on which a calendar month begins. We refer to the resulting variation in announcem...

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Bibliographic Details
Published in:Journal of financial economics Vol. 140; no. 3; pp. 865 - 893
Main Authors: Noh, Suzie, So, Eric C., Verdi, Rodrigo S.
Format: Journal Article
Language:English
Published: Amsterdam Elsevier B.V 01-06-2021
Elsevier Sequoia S.A
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Summary:We develop a novel methodology for studying the causal impact of announcement timing. Our methodology uses firms’ earnings announcements and leverages quasi-exogenous variation attributable to the specific day-of-week on which a calendar month begins. We refer to the resulting variation in announcement timing as “calendar rotations,” which are uncorrelated with proxies for announcement content. In applying our methodology, we show announcements moved forward by calendar rotations receive heightened media and investor attention, and experience greater earnings announcement premia. Taken together, our study details a method for studying how the timing of information flows impacts outcomes of interest to financial economists.
ISSN:0304-405X
1879-2774
DOI:10.1016/j.jfineco.2021.01.009