Corporate governance is recognized as one of the most important implications in building marketplace confidence and attracting positive investors in the organization specifically and the economy generally. An international wave of mergers and acquisitions has also swept the banking industry. In line with these changes, the fact remains unchanged that there is the need for countries to have sound resilient banking systems with good corporate governance. This will strengthen and upgrade the institution to survive in an increasingly open environment (Qi, Wu and Zhang, 2000; Köke and Renneboog, 2002 and Kashif, 2008).Given the fury of activities that have affected the efforts of banks to comply with the various consolidation policies and the antecedents of some operators in the system, there are concerns on the need to strengthen corporate governance in banks. This will boost public confidence and ensure efficient and effective functioning of the banking system (Soludo, 2004a).  According to Heidi and Marleen (2003:4), banking supervision cannot function well if sound corporate governance is not in place. Consequently, banking supervisors have strong interest in ensuring that there is effective corporate governance at every banking organization. As opined by Mayes, Halme and Aarno (2001), changes in bank ownership during the 1990s and early 2000s substantially altered governance of the world’s banking organization. These changes in the corporate governance of banks raised very important policy research questions. The fundamental question is how do these changes affect bank performance? It is therefore necessary to point out that the concept of corporate governance of banks and very large firms have been a priority on the policy agenda in developed market economies for over a decade.

Further to that, the concept is gradually warming itself as a priority in the African continent. Indeed, it is believed that the Asian crisis and the relative poor performance of the corporate sector in Africa have made the issue of corporate governance a catchphrase in the development debate (Berglof and Von -Thadden, 1999).Several events are therefore responsible for the heightened interest in corporate governance especially in both developed and developing countries. The subject of corporate governance leapt to global business limelight from relative obscurity after a string of collapses of high profile companies. Enron, the Houston, Texas based energy giant and WorldCom the telecom behemoth, shocked the business world with both the scale and age of their unethical and illegal operations. These organizations seemed to indicate only the tip of a dangerous iceberg. While corporate practices in the US companies came under attack, it appeared that the problem was far more widespread. Large and trusted companies from Parmalat in Italy to the multinational newspaper group Hollinger Inc., Adephia Communications Company, Global Crossing Limited and Tyco International Limited, revealed significant and deep-rooted problems in their corporate governance. Even the prestigious New York Stock Exchange had to remove its director (Dick Grasso) amidst public outcry over excessive compensation (La Porta, Lopez and Shleifer 1999). In developing economies, the banking sector among other sectors has also witnessed several cases of collapses, some of which include the Alpha Merchant Bank Ltd, Savannah Bank Plc, Societe Generale Bank Ltd (all in Nigeria), The Continental Bank of Kenya Ltd, Capital Finance Ltd, Consolidated Bank of Kenya Ltd and Trust Bank of Kenya among others (Akpan, 2007).In Nigeria, the issue of corporate governance has been given the front burner status by all sectors of the economy. For instance, the Securities and Exchange Commission (SEC) set up the Peterside Committee on corporate governance in public companies. The Bankers’ Committee also set up a sub-committee on corporate governance for banks and other financial institutions in Nigeria. This is in recognition of the critical role of corporate governance in the success or failure of companies (Ogbechie, 2006:6). Corporate governance therefore refers to the processes and structures by which the business and affairs of institutions are directed and managed, in order to improve long term share holders’ value by enhancing corporate performance and accountability, while taking into account the interest of other stakeholders (Jenkinson and Mayer, 1992).

Corporate governance is therefore, about building credibility, ensuring transparency and accountability as well as maintaining an effective channel of information disclosure that will foster good corporate performance.Jensen and Meckling (1976) acknowledged that the principal-agent theory which was also adopted in this study is generally considered as the starting point for any debate on the issue of corporate governance. A number of corporate governance mechanisms have been proposed to ameliorate the principal-agent problem between managers and their shareholders. These governance mechanisms as identified in agency theory include board size, board composition, CEO pay performance sensitivity, directors’ ownership and share holder right (Gomper, Ishii and Metrick, 2003). They further suggest that changing these governance mechanisms would cause managers to better align their interests with that of the shareholders thereby resulting in higher firm value.Although corporate governance in developing economies has recently received a lot of attention in the literature (Lin (2000); Goswami (2001); Oman (2001); Malherbe and Segal (2001); Carter, Colin and Lorsch (2004); Staikouras, Maria-Eleni, Agoraki, Manthos and Panagiotis (2007);  McConnell, Servaes and  Lins (2008) and Bebchuk, Cohen and Ferrell (2009), yet corporate governance of banks in developing economies as it relates to their financial performance has almost been ignored by researchers (Caprio and Levine (2002); Ntim (2009).

Even in developed economies, the corporate governance of banks and their financial performance has only been discussed recently in the literature (Macey and O’Hara, 2001). The few studies on bank corporate governance narrowly focused on a single aspect of governance, such as the role of directors or that of stock holders, while omitting other factors and interactions that may be important within the governance framework. Feasible among these few studies is the one by Adams and Mehran (2002) for a sample of US companies, where they examined the effects of board size and composition on value. Another weakness is that such research is often limited to the largest, actively traded organizations- many of which show little variation in their ownership, management and board structure and also measure performance as market value.In Nigeria, among the few empirically feasible studies on corporate governance are the studies by Sanda and Mukailu and Garba (2005) and Ogbechie (2006) that studied the corporate governance mechanisms and firms’ performance. In order to address these deficiencies, this study examined the role of corporate governance in the financial performance of Nigerian banks.