Principal-agent problem

The principal–agent problem, in political science and economics, (also known as agency dilemma or the agency problem) occurs when one person or entity (the "agent") is able to make decisions on behalf of, or that impact, another person or entity: the "principal". This dilemma exists in circumstances where agents are motivated to act in their own best interests, which are contrary to those of their principals, and is an example of moral hazard.

Common examples of this relationship include corporate management (agent) and shareholders (principal), politicians (agent) and voters (principal), or brokers (agent) and markets (buyers and sellers, principals). Consider a legal client (the principal) wondering whether their lawyer (the agent) is recommending protracted legal proceedings because it is truly necessary for the client's well being, or because it will generate income for the lawyer. In fact the problem can arise in almost any context where one party is being paid by another to do something where the agent has a small or nonexistent share in the outcome, whether in formal employment or a negotiated deal such as paying for household jobs or car repairs.

The problem arises where the two parties have different interests and asymmetric information (the agent having more information), such that the principal cannot directly ensure that the agent is always acting in their (the principal's) best interest, particularly when activities that are useful to the principal are costly to the agent, and where elements of what the agent does are costly for the principal to observe (see moral hazard and conflict of interest). Often, the principal may be sufficiently concerned at the possibility of being exploited by the agent that they choose not to enter into the transaction at all, when it would have been mutually beneficial: a suboptimal outcome that can lower welfare overall. The deviation from the principal's interest by the agent is called "agency costs".

Besides the agency problem between shareholders and managers, there is also another type of agency problem: the one derived from the existence of big shareholders and small shareholders, which is quite a common phenomenon in a listed company. In the process of dividend distribution, there exists not only information asymmetry but the different influence between big and small shareholders. Small shareholders’ behaviors are affected by the big shareholders’ decision; in return, they can also impact the big shareholders’ decision but not significantly. Under such circumstance, the big shareholders will encroach on the interests by dividend policy.

...
Wikipedia