根据委托代理理论，为了减少因信息不对称所产生的经理人员的道德风险行为，股东需要对经理人员进行监督。
According to the theory of principal-agent, the shareholder should supervise the behavior of the manager in order to reduce the moral risk came from the asymmetry of information.
随着企业委托代理关系的确立，对于代理人的经营管理行为应该加以监督、约束和激励。
With the establishment of the principal-agent relationship in enterprises, the management behavior of an agent should be under supervision, control and inspiration.
由于信息不对称，委托人（病人）自始至终无法也没有激励机制去监督代理人（医生）行为。
Because of the asymmetric information problem, the principal (patient) is unable and without incentive to supervise the agent 's (doctor's) activities from begiming to end.
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