Principal-Agent Problem
What is Principal-Agent Problem?
The principal-agent problem arises when one party (the agent) acts on behalf of another (the principal) but has different incentives and better information.
Examples include shareholders (principals) and CEOs (agents), or voters and politicians. Because the agent may pursue its own interests, principals use contracts, monitoring, and incentive pay to align goals.
Principal-Agent Problem: a worked example
A store owner hires a manager she cannot watch. Low effort leaves the store with $200,000 after all costs except the manager's pay, while high effort leaves $260,000. High effort costs the manager the equivalent of $15,000 in lost time and strain, and the manager can earn $55,000 elsewhere. Under a flat $60,000 salary the manager compares $60,000 for low effort against 60,000 minus 15,000, or $45,000, for high effort, and picks low. The owner keeps 200,000 minus 60,000, or $140,000. Now offer a base of $50,000 plus 40 percent of anything above $200,000. High effort pays 50,000 plus 0.40 times 60,000, or $74,000, netting $59,000 after the effort cost, while low effort pays only the $50,000 base. The manager works hard, clears the $55,000 outside offer, and the owner keeps 260,000 minus 74,000, or $186,000, up $46,000.
The mistake students make with principal-agent problem
Students reduce it to the agent being lazy or dishonest. That reading feels right, and it drops the two conditions that create the problem: incentives that point in different directions, and an action the principal cannot observe. Remove either one and the problem disappears. If effort were visible, the contract could simply require it and pay a flat wage, and an agent who already shared the principal's goals would need no contract at all. A manager who takes the easy path under a salary that pays the same either way is responding to the contract, not breaking it.
Principal-Agent Problem questions
Who is the principal and who is the agent?
The principal is the party who delegates a task and bears the consequences of how it gets done, such as a shareholder, a client, a landlord, or a voter. The agent is the party hired to act on the principal's behalf, such as a chief executive, a lawyer, a property manager, or an elected official. A quick check is to ask whose money or outcome is on the line, because that party is the principal.
How do you solve the principal-agent problem?
Contracts that tie the agent's pay to the outcome the principal cares about do most of the work: commission, profit sharing, equity grants, or bonuses tied to measured results. Monitoring, audits, and reporting requirements shrink the information gap directly. Reputation helps too, since an agent expecting repeat business has a reason to behave. None of these fully removes the problem, because the agent then bears risk and every measure of performance is imperfect.
Is the principal-agent problem the same as moral hazard?
Moral hazard names the hidden action side of the principal-agent problem, where the agent's effort or care cannot be observed after the contract is signed. The broader principal-agent framing also covers adverse selection, where the agent's type or ability is hidden before the contract is signed. Both come from asymmetric information, but the timing differs, since adverse selection strikes at the point of hiring and moral hazard strikes afterward.
Related terms
Common comparisons
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