Utilizing a large sample of South Korean firms, this paper explores the impact of corporate governance in an emerging market country dominated by a few large business groups. Firms affiliated with the top five groups (chaebol) exhibit significantly lower performance and significantly higher sales growth relative to other firms. Furthermore, top executive turnover is unrelated to performance for top chaebol firms, indicating a breakdown of internal corporate governance for the largest business groups. Internal corporate governance appears much more effective for firms unrelated to the top chaebol as managers at poorly performing firms are significantly more likely to lose their job. These results imply that the lack of properly functioning internal corporate governance among the top chaebol, which dominate the Korean economy, may have increased the severity of the recent financial crisis.

We investigate external and internal corporate governance activity observed at Japanese banks over 1985–1996. External governance appears to be inactive, and even after the onset of the banking crisis of the 1990s there are few mergers, failures, and other changes in ownership and control. Prior to the banking crisis we do not find a relation between bank performance and executive turnover. In contrast, non-routine turnover of bank presidents is inversely related to both stock returns and profitability in the 1990s. Consequently, internal governance activity is observable following the onset of the Japanese banking crisis, a period otherwise characterized by inactive external governance and regulatory forbearance.