In contrast to entry-level professional labor markets, in which cohort
s of candidates and positions become available at the same time (e.g.,
when candidates graduate from school), senior level positions typical
ly become available when an incumbent retires, or a new position is cr
eated, and when a senior position is filled a new vacancy is often cre
ated elsewhere. We model senior level labor markets as two-sided match
ing markets in which matchings are destabilized by retirements and new
entries, and can return to stability by a decentralized process of of
fers and acceptances. This generalizes the standard analysis in a way
which has points of contact with the sociological literature on vacanc
y chains. (C) 1997 Academic Press.