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The Deterrence Effect of Whistleblowing: An Event Study of Leaked Customer Information from Banks in Tax Havens

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  • Niels Johannesen
  • Tim Stolper

Abstract

We document that the first leak of customer information from a tax haven bank caused a sudden flight of deposits from tax havens and a sharp decrease in the market value of banks known to be assisting with tax evasion. The loss of market value was largest for the banks most strongly involved in tax evasion and zero for banks with no known ties to tax evasion. Subsequent leaks had qualitatively similar although smaller effects. Our findings suggest that whistleblowing in tax haven banks deters offshore tax evaders by increasing the perceived risk of committing and assisting with tax evasion.

Suggested Citation

  • Niels Johannesen & Tim Stolper, 2017. "The Deterrence Effect of Whistleblowing: An Event Study of Leaked Customer Information from Banks in Tax Havens," CESifo Working Paper Series 6784, CESifo.
    • Handle: RePEc:ces:ceswps:_6784
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    2. Alstadsæter, Annette & Johannesen, Niels & Zucman, Gabriel, 2018. "Who owns the wealth in tax havens? Macro evidence and implications for global inequality," Journal of Public Economics, Elsevier, vol. 162(C), pages 89-100.
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    7. Langenmayr, Dominika, 2017. "Voluntary disclosure of evaded taxes — Increasing revenue, or increasing incentives to evade?," Journal of Public Economics, Elsevier, vol. 151(C), pages 110-125.
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    9. Gabriel Zucman, 2013. "The Missing Wealth of Nations: Are Europe and the U.S. net Debtors or net Creditors?," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 128(3), pages 1321-1364.
    10. Jørgen Juel Andersen & Niels Johannesen & David Dreyer Lassen & Elena Paltseva, 2017. "Petro Rents, Political Institutions, and Hidden Wealth: Evidence from Offshore Bank Accounts," Journal of the European Economic Association, European Economic Association, vol. 15(4), pages 818-860.
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    14. Tim B.M. Stolper, 2017. "A Step Change in Tax Transparency? An Event Study on How the Automatic Exchange of Information Did Not Affect Swiss Banks," Working Papers tax-mpg-rps-2017-10, Max Planck Institute for Tax Law and Public Finance.
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    16. J�rgen Juel Andersen & Niels Johannesen & David Dreyer Lassen & Elena Paltseva, 2013. "Petro Rents, Political Institutions, and Hidden Wealth: Evidence from Bank Deposits in Tax Havens," Working Papers No 7/2013, Centre for Applied Macro- and Petroleum economics (CAMP), BI Norwegian Business School.
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    Cited by:

    1. Menkhoff, Lukas & Miethe, Jakob, 2019. "Tax evasion in new disguise? Examining tax havens' international bank deposits," EconStor Open Access Articles and Book Chapters, ZBW - Leibniz Information Centre for Economics, vol. 176, pages 53-78.
    2. Laila Ait Bihi Ouali, 2019. "Top Income Tax Evasion and Redistribution Preferences: Evidence from the Panama Papers," AMSE Working Papers 1901, Aix-Marseille School of Economics, France.
    3. Niels Johannesen & Patrick Langetieg & Daniel Reck & Max Risch & Joel Slemrod, 2020. "Taxing Hidden Wealth: The Consequences of US Enforcement Initiatives on Evasive Foreign Accounts," American Economic Journal: Economic Policy, American Economic Association, vol. 12(3), pages 312-346, August.
    4. Bastani, Spencer & Waldenström, Daniel, 2018. "How Should Capital Be Taxed? Theory and Evidence from Sweden," IZA Discussion Papers 11475, Institute of Labor Economics (IZA).
    5. Annette Alstadsæter & Niels Johannesen & Gabriel Zucman, 2019. "Tax Evasion and Inequality," American Economic Review, American Economic Association, vol. 109(6), pages 2073-2103, June.
    6. Vincent Bouvatier & Gunther Capelle-Blancard & Anne-Laure Delatte, 2017. "Banks Defy Gravity in Tax Havens," Working Papers 2017-16, CEPII research center.
    7. Reindl, Ilona & Tyran, Jean-Robert, 2021. "Equal opportunities for all? How income redistribution promotes support for economic inclusion," Journal of Economic Behavior & Organization, Elsevier, vol. 190(C), pages 390-407.
    8. Alstadsæter, Annette & Johannesen, Niels & Le Guern Herry, Ségal & Zucman, Gabriel, 2022. "Tax evasion and tax avoidance," Journal of Public Economics, Elsevier, vol. 206(C).
    9. Jørgen Juel Andersen & Niels Johannesen & Bob Rijkers, 2022. "Elite Capture of Foreign Aid: Evidence from Offshore Bank Accounts," Journal of Political Economy, University of Chicago Press, vol. 130(2), pages 388-425.
    10. Theo Nyreröd & Giancarlo Spagnolo, 2021. "Myths and numbers on whistleblower rewards," Regulation & Governance, John Wiley & Sons, vol. 15(1), pages 82-97, January.
    11. Spagnolo, Giancarlo & Nyreröd, Theo, 2019. "Financial Incentives for Whistleblowers: A Short Survey," SITE Working Paper Series 50, Stockholm School of Economics, Stockholm Institute of Transition Economics.
    12. Nyreröd, Theo & Spagnolo, Giancarlo, 2017. "Myths and Numbers on Whistleblower Rewards," SITE Working Paper Series 44, Stockholm School of Economics, Stockholm Institute of Transition Economics, revised 27 Apr 2018.
    13. Alejandro Esteller-Moré & Shafik Hebous & Niels Johannesen & Katarzyna Anna Bilicka, 2018. "The Present and Future of Tax Havens / El presente y futuro de los paraísos fiscales / El present i futur dels paradisos fiscals," IEB Reports ieb_report_4_2018, Institut d'Economia de Barcelona (IEB).
    14. Matthew Gould & Matthew D. Rablen, 2020. "Voluntary disclosure schemes for offshore tax evasion," International Tax and Public Finance, Springer;International Institute of Public Finance, vol. 27(4), pages 805-831, August.
    15. Spencer Bastani & Daniel Waldenström, 2018. "How should capital be taxed? The Swedish experience," World Inequality Lab Working Papers hal-02878153, HAL.
    16. Laila Ait Bihi Ouali, 2020. "Effects of signalling tax evasion on redistribution and voting preferences: Evidence from the Panama Papers," PLOS ONE, Public Library of Science, vol. 15(3), pages 1-22, March.
    17. Tim B.M. Stolper, 2017. "A Step Change in Tax Transparency? An Event Study on How the Automatic Exchange of Information Did Not Affect Swiss Banks," Working Papers tax-mpg-rps-2017-10, Max Planck Institute for Tax Law and Public Finance.
    18. Batten, Jonathan A. & Lončarski, Igor & Szilagyi, Peter G., 2021. "Strategic insider trading in foreign exchange markets," Journal of Corporate Finance, Elsevier, vol. 69(C).

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    More about this item

    Keywords

    whistleblowing; economic crime; tax evasion; tax havens;
    All these keywords.

    JEL classification:

    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages
    • H26 - Public Economics - - Taxation, Subsidies, and Revenue - - - Tax Evasion and Avoidance
    • K42 - Law and Economics - - Legal Procedure, the Legal System, and Illegal Behavior - - - Illegal Behavior and the Enforcement of Law

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