Hidden Action and Hidden Information

Hidden action and hidden information describe different information asymmetries in strategic relationships. Unobservable behavior can create moral hazard, while privately known characteristics can affect selection into an exchange. Whether a problem arises depends on preferences, incentives, information, and available institutions.

Hidden action concerns choices another party cannot fully observe or verify, such as care taken during a service. Hidden information concerns privately known characteristics or circumstances relevant to an exchange. These are different reasons an agreement can misfire: observing a poor outcome may reveal neither the action taken nor the underlying difficulty.

The response should address the actual missing information. A demonstration may reveal capability before a commitment; an agreed progress record may make later work more assessable. Both have costs and limits. Incentives based on noisy outcomes can punish bad luck, while intrusive monitoring can undermine trust or privacy. Information asymmetry describes a structure, not proof that someone is deceitful.

When to use it

When contractual or institutional relationships are undermined by information asymmetry; when moral hazard needs to be reduced through incentive design; when adverse selection threatens market quality; when understanding why some markets produce poor outcomes despite willing participants.

How it can help

Identify the particular missing fact or unverifiable action before considering evidence, screening, signaling, monitoring, or incentive terms. Evaluate the costs and new distortions created by each remedy.