Information Asymmetry

Information asymmetry occurs when parties have different relevant information about a decision, transaction, or action. It can affect participation, incentives, and outcomes, but does not necessarily involve dishonesty or failure. Adverse selection and moral hazard are distinct mechanisms that can arise under particular information and incentive conditions.

Information asymmetry means participants possess different relevant information. The difference may concern a product's condition, someone's private circumstances, or an action that is difficult to observe. More information is not always concentrated on one side: a provider may know technical details while a customer knows their own requirements better.

The mechanism depends on what the hidden information changes. Before an agreement it may affect who participates, while after an agreement hidden actions can interact with incentives. Inspection, credible disclosure, signaling, screening, or contract design address different gaps. Finding an asymmetry is therefore the start of diagnosis, not proof of deception or a complete explanation of failure.

When to use it

When participants cannot observe important quality, circumstances, or actions, and when the resulting uncertainty affects agreement, participation, or ongoing incentives.

How it can help

Identify the specific hidden fact or action and how it affects the decision. Compare targeted inspection, disclosure, signaling, screening, or contractual arrangements while accounting for their reliability and costs.