If you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services. AbstractPurpose -The purpose of this paper is to examine the impact of board characteristics and external audit quality on earnings management among major Tunisian banks over the period 2003-2007. Design/methodology/approach -Multivariate regressions are employed to test the effect of board structure and external audit quality on discretionary provisions as a proxy for earnings management. Findings -Results indicate that among the characteristics of the board, CEO duality is associated with higher levels of discretionary provisions. However, the presence of directors affiliated to the largest shareholder tends to constrain earnings management practices. The results reveal also that a co-audit belonging to the BIG 4 provides incentives to manage earnings while the capacity of the external auditor to disclose reservations impacts negatively the manager's discretion. Practical implications -First, it is not desirable to appoint a co-audit both belonging to the BIG 4. Second, the presence of affiliated directors reduces the discretionary practices except in cases where directors are affiliated to families. In this case, banks should strengthen the presence of independent directors. Finally, the delineation of the leeway left in the Tunisian accounting standards would provide more transparent financial information.Originality/value -This study contributes to the literature on governance and its impact on earnings management among Tunisian banks by introducing two variables that have not been tested before which are affiliated directors and co-audit. The paper will be of value to banks willing to comply with the Governance Good Practice Guide adopted recently in Tunisia.