This paper rationalizes the existence of multiple, biased principals a
s a discipline device that induces agents to expend effort, Specifical
ly, principals are given incentives that induce them to take actions t
hat reward (punish) agents after good (bad) performance. This framewor
k is illustrated in the case of corporations, which rely on equityhold
ers and debtholders to keep management in check, and in the case of mu
ltiministry oversight of state-owned firms.