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Principal-Agent Problems

Why It Matters

Employment, management, democracy, finance, healthcare - all involve principals delegating to agents with divergent interests. The framing reveals where interests diverge and what structures address it. Most organizational problems have principal-agent structure.

The Key Move

Identify the principal and agent. Ask: where do their interests diverge? What can the agent do or know that the principal can't observe? Then evaluate how the relationship structure addresses (or fails to address) this gap.

Classic Application

Employment. Employers (principal) want effort. Employees (agent) want compensation with minimal effort. The agent has private information about their effort and ability. Monitoring, incentive pay, and career concerns address the gap imperfectly.

Surprising Application

Democracy. Citizens (principal) delegate to politicians (agent) with divergent interests and private information about their actions and abilities. Elections are an imperfect monitoring mechanism. Politicians have short horizons and concentrated interests; citizens have long horizons and diffuse interests.

Failure Modes

  • Assuming aligned interests when they diverge - "we're all on the same team" often isn't true
  • Over-relying on monitoring - costly and incomplete
  • Ignoring multi-principal problems - agents often serve multiple masters with conflicting demands
  • Treating agents as having fixed types - effort and honesty respond to incentives
  • Confusing the level of analysis - who is principal and who is agent depends on the frame

Go Deeper

Jensen and Meckling's foundational paper on agency costs. Milgrom and Roberts' "Economics, Organization and Management."