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Forecast Errors in Undisclosed Management Sales Forecasts: The Disappearance of the Overoptimism Bias

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  • Müller, Hans Christian
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    Abstract

    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. --

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    Bibliographic Info

    Paper provided by Heinrich‐Heine‐Universität Düsseldorf, Düsseldorf Institute for Competition Economics (DICE) in its series DICE Discussion Papers with number 40.

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    Date of creation: 2011
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    Handle: RePEc:zbw:dicedp:40

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    Keywords: Management forecasts; Overoptimism; Overpessimism; Germany;

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    1. 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.
    2. 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.
    3. Klaus Abberger & Manuel Birnbrich & Christian Seiler, 2009. "Der »Test des Tests« im Handel – eine Metaumfrage zum ifo Konjunkturtest," Ifo Schnelldienst, Ifo Institute for Economic Research at the University of Munich, vol. 62(21), pages 34-41, November.
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    Cited by:
    1. Stühmeier, Torben & Wenzel, Tobias, 2012. "Regulating advertising in the presence of public service broadcasting," DICE Discussion Papers 41, Heinrich‐Heine‐Universität Düsseldorf, Düsseldorf Institute for Competition Economics (DICE).

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