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Contractual corporate governance

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  • Goergen, Marc
  • Renneboog, Luc

Abstract

Companies have the choice to deviate from their national corporate governance standards by opting into another system. They can do so via contractual devices - such as cross-border mergers and acquisitions, (re)incorporations, and cross-listings - which enable them to choose their preferred level of investor protection and regulation. This paper reviews these three main contractual governance devices, their effect on value, and whether their adoption by firms induces a race to the bottom or a race to the top. Indeed, firms may opt for less shareholder-orientation or investor protection (shareholder-expropriation hypothesis) rather than for more stringent rules that require firms to focus on shareholder value (bonding hypothesis).

Suggested Citation

  • Goergen, Marc & Renneboog, Luc, 2008. "Contractual corporate governance," Journal of Corporate Finance, Elsevier, vol. 14(3), pages 166-182, June.
    • Handle: RePEc:eee:corfin:v:14:y:2008:i:3:p:166-182
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    as
    1. Vidhi Chhaochharia & Yaniv Grinstein, 2007. "Corporate Governance and Firm Value: The Impact of the 2002 Governance Rules," Journal of Finance, American Finance Association, vol. 62(4), pages 1789-1825, August.
    2. Doidge, Craig & Karolyi, G. Andrew & Stulz, Rene M., 2004. "Why are foreign firms listed in the U.S. worth more?," Journal of Financial Economics, Elsevier, vol. 71(2), pages 205-238, February.
    3. Bertrand, M. & Mullainathan, S., 1998. "Executive Compensation and Incentives: the Impact of Takeover Legislation," Papers 202, Princeton, Woodrow Wilson School - Public and International Affairs.
    4. Abdallah, Wissam & Goergen, Marc, 2008. "Does corporate control determine the cross-listing location?," Journal of Corporate Finance, Elsevier, vol. 14(3), pages 183-199, June.
    5. Lucian Arye Bebchuk, 1999. "A Rent-Protection Theory of Corporate Ownership and Control," NBER Working Papers 7203, National Bureau of Economic Research, Inc.
    6. Marianne Bertrand & Sendhil Mullainathan, 1999. "Is There a Discretion in Wage Setting? A Test Using Takeover Legislation," RAND Journal of Economics, The RAND Corporation, vol. 30(3), pages 535-554, Autumn.
    7. La Porta, Rafael & Lopez-de-Silanes, Florencio & Shleifer, Andrei & Vishny, Robert, 2000. "Investor protection and corporate governance," Journal of Financial Economics, Elsevier, vol. 58(1-2), pages 3-27.
    8. Christos Cabolis & Arturo Bris, 2004. "Corporate Governance Convergence Through Cross-Border Mergers: The Case of Aventis," Yale School of Management Working Papers amz2511, Yale School of Management, revised 01 Dec 2004.
    9. Bris, Arturo & Brisley, Neil & Cabolis, Christos, 2008. "Adopting better corporate governance: Evidence from cross-border mergers," Journal of Corporate Finance, Elsevier, vol. 14(3), pages 224-240, June.
    10. Becht, Marco & Mayer, Colin & Wagner, Hannes F., 2008. "Where do firms incorporate? Deregulation and the cost of entry," Journal of Corporate Finance, Elsevier, vol. 14(3), pages 241-256, June.
    11. La Porta, Rafael & Florencio Lopez-de-Silanes & Andrei Shleifer & Robert W. Vishny, 1997. "Legal Determinants of External Finance," Journal of Finance, American Finance Association, vol. 52(3), pages 1131-1150, July.
    12. Daines, Robert, 2001. "Does Delaware law improve firm value?," Journal of Financial Economics, Elsevier, vol. 62(3), pages 525-558, December.
    13. Bhagat, Sanjai & Brickley, James A, 1984. "Cumulative Voting: The Value of Minority Shareholder Voting Rights," Journal of Law and Economics, University of Chicago Press, vol. 27(2), pages 339-365, October.
    14. Marc Goergen, 2005. "Corporate Governance Convergence: Evidence From Takeover Regulation Reforms in Europe," Oxford Review of Economic Policy, Oxford University Press and Oxford Review of Economic Policy Limited, vol. 21(2), pages 243-268, Summer.
    15. Agrawal, Anup & Mandelker, Gershon N., 1990. "Large Shareholders and the Monitoring of Managers: The Case of Antitakeover Charter Amendments," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 25(2), pages 143-161, June.
    16. Ayyagari, Meghana, 2004. "Does cross-listing lead to functional convergence? Empirical evidence," Policy Research Working Paper Series 3264, The World Bank.
    17. Rafael La Porta & Florencio Lopez‐De‐Silanes & Andrei Shleifer & Robert Vishny, 2002. "Investor Protection and Corporate Valuation," Journal of Finance, American Finance Association, vol. 57(3), pages 1147-1170, June.
    18. Roberta Romano, 2001. "The Need for Competition in International Securities Regulation," Yale School of Management Working Papers ysm214, Yale School of Management, revised 01 Sep 2001.
    19. Mark J. Roe, 2005. "Regulatory Competition in Making Corporate Law in the United States—and its Limits," Oxford Review of Economic Policy, Oxford University Press and Oxford Review of Economic Policy Limited, vol. 21(2), pages 232-242, Summer.
    20. Kahan, Marcel & Kamar, Ehud, 2002. "The Myth of State Competition in Corporate Law," Berkeley Olin Program in Law & Economics, Working Paper Series qt3xq7p9xw, Berkeley Olin Program in Law & Economics.
    21. Colin Mayer & Zsuzsanna Fluck & Department of Finance & Michigan State University, 2005. "Race to the top or bottom? Corporate governance, freedom of reincorporation and competition in law," Economics Series Working Papers 2005-FE-07, University of Oxford, Department of Economics.
    22. Rafael La Porta & Florencio Lopez-de-Silanes & Andrei Shleifer & Robert W. Vishny, 1998. "Law and Finance," Journal of Political Economy, University of Chicago Press, vol. 106(6), pages 1113-1155, December.
    23. Stulz, Rene M. & Williamson, Rohan, 2003. "Culture, openness, and finance," Journal of Financial Economics, Elsevier, vol. 70(3), pages 313-349, December.
    24. Rossi, Stefano & Volpin, Paolo F., 2004. "Cross-country determinants of mergers and acquisitions," Journal of Financial Economics, Elsevier, vol. 74(2), pages 277-304, November.
    25. Marina Martynova & Luc Renneboog, 2010. "Spillover of Corporate Governance Standards in Cross-Border Mergers and Acquisition," Chapters, in: Alessio M. Pacces (ed.), The Law and Economics of Corporate Governance, chapter 3, Edward Elgar Publishing.
    26. Rafael La Porta & Florencio Lopez‐De‐Silanes & Andrei Shleifer, 1999. "Corporate Ownership Around the World," Journal of Finance, American Finance Association, vol. 54(2), pages 471-517, April.
    27. Becht, Marco & Bolton, Patrick & Roell, Ailsa, 2003. "Corporate governance and control," Handbook of the Economics of Finance, in: G.M. Constantinides & M. Harris & R. M. Stulz (ed.), Handbook of the Economics of Finance, edition 1, volume 1, chapter 1, pages 1-109, Elsevier.
    28. Bebchuk, Lucian Arye & Cohen, Alma, 2003. "Firms' Decisions Where to Incorporate," Journal of Law and Economics, University of Chicago Press, vol. 46(2), pages 383-425, October.
    29. Marosi, András & Massoud, Nadia, 2007. "Why Do Firms Go Dark?," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 42(2), pages 421-442, June.
    30. Gregoriou, Greg N. & Renneboog, Luc, 2007. "Corporate Governance and Regulatory Impact on Mergers and Acquisitions," Elsevier Monographs, Elsevier, edition 1, number 9780123741424.
    31. Zsuzsanna Fluck & Colin Mayer, 2005. "Race to the top or bottom? Corporate governance, freedom of reincorporation and competition in law," Annals of Finance, Springer, vol. 1(4), pages 349-378, October.
    32. Oren Bar-Gill & Michal Barzuza & Lucian Bebchuk, 2006. "The Market for Corporate Law," Journal of Institutional and Theoretical Economics (JITE), Mohr Siebeck, Tübingen, vol. 162(1), pages 134-160, March.
    33. Doidge, Craig, 2004. "U.S. cross-listings and the private benefits of control: evidence from dual-class firms," Journal of Financial Economics, Elsevier, vol. 72(3), pages 519-553, June.
    34. Doidge, Craig & Karolyi, G. Andrew & Stulz, Rene, 2007. "Has New York Become Less Competitive in Global Markets? Evaluating Foreign Listing Choices over Time," Working Paper Series 2007-9, Ohio State University, Charles A. Dice Center for Research in Financial Economics.
    35. Henry Hansmann & Reinier Kraakman, 2000. "The End Of History For Corporate Law," Yale School of Management Working Papers ysm136, Yale School of Management, revised 01 Feb 2001.
    36. Karpoff, Jonathan M. & Malatesta, Paul H., 1995. "State takeover legislation and share values: The wealth effects of Pennsylvania's Act 36," Journal of Corporate Finance, Elsevier, vol. 1(3-4), pages 367-382, April.
    37. Guhan Subramanian, 2004. "The Disappearing Delaware Effect," The Journal of Law, Economics, and Organization, Oxford University Press, vol. 20(1), pages 32-59, April.
    38. Malatesta, Paul H. & Walkling, Ralph A., 1988. "Poison pill securities : Stockholder wealth, profitability, and ownership structure," Journal of Financial Economics, Elsevier, vol. 20(1-2), pages 347-376, January.
    39. Roberta Romano, 1998. "Empowering Investors: A Market Approach to Securities Regulation," Yale School of Management Working Papers ysm74, Yale School of Management.
    40. Szewczyk, Samuel H. & Tsetsekos, George P., 1992. "State intervention in the market for corporate control : The case of Pennsylvania Senate Bill 1310," Journal of Financial Economics, Elsevier, vol. 31(1), pages 3-23.
    41. Lucian Bebchuk & Alma Cohen & Allen Ferrell, 2002. "Does the Evidence Favor State Competition in Corporate Law?," NBER Working Papers 9380, National Bureau of Economic Research, Inc.
    42. Marco Becht, 2005. "Corporate Governance: An Assessment," Oxford Review of Economic Policy, Oxford University Press and Oxford Review of Economic Policy Limited, vol. 21(2), pages 155-163, Summer.
    43. Dodd, Peter & Leftwich, Richard, 1980. "The Market for Corporate Charters: "Unhealthy Competition versus Federal Regulation."," The Journal of Business, University of Chicago Press, vol. 53(3), pages 259-283, July.
    44. G.M. Constantinides & M. Harris & R. M. Stulz (ed.), 2003. "Handbook of the Economics of Finance," Handbook of the Economics of Finance, Elsevier, edition 1, volume 1, number 1.
    45. Klaus Gugler & Dennis C. Mueller & B. Burcin Yurtoglu, 2004. "Corporate Governance and Globalization," Oxford Review of Economic Policy, Oxford University Press and Oxford Review of Economic Policy Limited, vol. 20(1), pages 129-156, Spring.
    46. Cumming, Douglas J. & MacIntosh, Jeffrey G., 2002. "The rationales underlying reincorporation and implications for Canadian corporations," International Review of Law and Economics, Elsevier, vol. 22(3), pages 277-330, September.
    47. Zhang, Ivy Xiying, 2007. "Economic consequences of the Sarbanes-Oxley Act of 2002," Journal of Accounting and Economics, Elsevier, vol. 44(1-2), pages 74-115, September.
    48. Roberta Romano, "undated". "The Need for Competition in International Securities Regulation," Yale Law School John M. Olin Center for Studies in Law, Economics, and Public Policy Working Paper Series yale_lepp-1015, Yale Law School John M. Olin Center for Studies in Law, Economics, and Public Policy.
    49. Reese, William Jr. & Weisbach, Michael S., 2002. "Protection of minority shareholder interests, cross-listings in the United States, and subsequent equity offerings," Journal of Financial Economics, Elsevier, vol. 66(1), pages 65-104, October.
    50. G.M. Constantinides & M. Harris & R. M. Stulz (ed.), 2003. "Handbook of the Economics of Finance," Handbook of the Economics of Finance, Elsevier, edition 1, volume 1, number 2.
    51. Karpoff, Jonathan M. & Malatesta, Paul H., 1989. "The wealth effects of second-generation state takeover legislation," Journal of Financial Economics, Elsevier, vol. 25(2), pages 291-322, December.
    52. Peterson, Pamela P, 1988. "Reincorporation: Motives and Shareholder Wealth," The Financial Review, Eastern Finance Association, vol. 23(2), pages 151-160, May.
    53. Roberta Romano, 2004. "The Sarbanes-Oxley Act and the Making of Quack Corporate Governance," Yale School of Management Working Papers amz2653, Yale School of Management, revised 01 Jul 2005.
    54. Romano, Roberta, 1985. "Law as a Product: Some Pieces of the Incorporation Puzzle," The Journal of Law, Economics, and Organization, Oxford University Press, vol. 1(2), pages 225-283, Fall.
    55. Litvak, Kate, 2007. "The effect of the Sarbanes-Oxley act on non-US companies cross-listed in the US," Journal of Corporate Finance, Elsevier, vol. 13(2-3), pages 195-228, June.
    56. Marianne Bertrand & Sendhil Mullainathan, 1998. "Executive Compensation and Incentives: The Impact of Takeover Legislation," Working Papers 783, Princeton University, Department of Economics, Industrial Relations Section..
    57. Leuz, Christian, 2006. "Cross listing, bonding and firms' reporting incentives: A discussion of Lang, Raedy and Wilson (2006)," Journal of Accounting and Economics, Elsevier, vol. 42(1-2), pages 285-299, October.
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    More about this item

    JEL classification:

    • G32 - Financial Economics - - Corporate Finance and Governance - - - Financing Policy; Financial Risk and Risk Management; Capital and Ownership Structure; Value of Firms; Goodwill
    • G38 - Financial Economics - - Corporate Finance and Governance - - - Government Policy and Regulation
    • K2 - Law and Economics - - Regulation and Business Law
    • G3 - Financial Economics - - Corporate Finance and Governance
    • G34 - Financial Economics - - Corporate Finance and Governance - - - Mergers; Acquisitions; Restructuring; Corporate Governance

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