On the Reliability of I/B/E/S Earnings Announcement Dates and Forecasts

Daniella Acker and Nigel Duck ()

Bristol Economics Discussion Papers from Department of Economics, University of Bristol, UK

Abstract: We add to the concerns raised in Ljungqvist, Malloy and Marston, 2009, Rewriting History, Journal of Finance, 64, 1935-1960, about the reliability of the I/B/E/S data provided by Thomson Reuters (TR). Many of the dates reported as earnings announcement dates are not earnings announcement dates; there are inconsistencies between these dates and those reported in Worldscope, another TR database; and summaries of financial analysts’ forecasts can be misleading. Following discussions with the authors, TR has reviewed approximately 2 million records and is in the process of correcting some 50,000 of them. Further reviews are under way.

Keywords: I/B/E/S; Worldscope, earnings announcements, analysts’ forecasts (search for similar items in EconPapers)
JEL-codes: G00 G10 G14 G32 (search for similar items in EconPapers)
Date: 2009-11
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Persistent link: http://EconPapers.repec.org/RePEc:bri:uobdis:09/611

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