Forecast Errors in Undisclosed Management Sales Forecasts: The Disappearance of the Overoptimism Bias
Previous empirical evidence which evaluated the accuracy of management earnings or sales forecasts consistently revealed these forecasts to be on average signi cantly overoptimistic. However, all studies analyzed forecasts from public disclosures, which are an important signal to investors and analysts and thus possibly biased by strategic considerations. To disentagle whether and to which extent strategic deception or cognitive biases are resposible for this overoptimism, the present study analyzes the accuracy of 6,234 undisclosed, company-internal sales forecasts, which German firms provided anonymously to the IAB Establishment Panel. Quite surprisingly, the study reveals the average forecast to be signi cantly overpessimistic. I propose that the non-existence of a general bias towards overoptimism is due to the lack of incentives to consciously overgloss future prospects in undisclosed forecasts and that overpessimism may be a consequence of loss aversion.
|Date of creation:||2011|
|Contact details of provider:|| Postal: +49 211 81-13820|
Phone: +49 211 81-15494
Fax: +49 211 81-15499
Web page: http://www.dice.hhu.de/en.html
More information through EDIRC
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Brad M. Barber & Terrance Odean, 2001. "Boys will be Boys: Gender, Overconfidence, and Common Stock Investment," The Quarterly Journal of Economics, Oxford University Press, vol. 116(1), pages 261-292.
- repec:bla:joares:v:37:y:1999:i:1:p:57-81 is not listed on IDEAS
- Cho, Myojung & Hah, Young D. & Kim, Oliver, 2011. "Optimistic bias in management forecasts by Japanese firms to avoid forecasting losses," The International Journal of Accounting, Elsevier, vol. 46(1), pages 79-101, March.
- Klaus Abberger & Manuel Birnbrich & Christian Seiler, 2009. "Der »Test des Tests« im Handel – eine Metaumfrage zum ifo Konjunkturtest," ifo Schnelldienst, ifo Institute - Leibniz Institute for Economic Research at the University of Munich, vol. 62(21), pages 34-41, November.
- Brown, Philip & Clarke, Alex & How, Janice C. Y. & Lim, Kadir, 2000. "The accuracy of management dividend forecasts in Australia," Pacific-Basin Finance Journal, Elsevier, vol. 8(3-4), pages 309-331, July.
- Dan Lovallo & Colin Camerer, 1999. "Overconfidence and Excess Entry: An Experimental Approach," American Economic Review, American Economic Association, vol. 89(1), pages 306-318, March.