This study uses a large sample of firms to examine how human capital considerations affect the process of CEO succession. Costs and benefits of succession planning are affected by a firm's level of operational complexity and human capital requirements; firms that are more complex incur greater costs to transferring firm-specific knowledge and expertise to an outsider, and should be more likely to groom an internal candidate for the CEO position. Consistent with this, I find that a firm's propensity to groom an internal candidate for the CEO position is related to firm size, degree of diversification, and industry structure. My results also suggest that succession planning is associated with a higher probability of inside succession and voluntary succession and a lower probability of forced succession. I also provide evidence that horizon problems are mitigated to some extent by having a succession plan.

We examine whether CEO turnover and succession patterns vary with firm complexity. Specifically, we compare CEO turnover in diversified versus focused firms. We find that CEO turnover in diversified firms is completely insensitive to both accounting and stock-price performance, but CEO turnover in focused firms is sensitive to firm performance. Diversified firms also experience less forced turnover than focused firms. Following turnover, replacement CEOs in diversified firms are older, more educated, and are paid more when hired. Collectively, our results indicate that the labor market for CEOs is different across diversified and focused firms and that firm complexity and scope affect CEO succession.