This paper documents a strong positive relation between the percentage
of outside directors and the frequency of outside CEO succession. The
likelihood that an executive from outside the firm is appointed CEO i
ncreases monotonically with the percentage of outside directors. This
monotonic relation is observed for both voluntary and forced departure
s. Evidence from stock returns around succession announcements indicat
es that, on average, shareholders benefit from outside appointments, b
ut are harmed when an insider replaces a fired CEO.