Asymmetric information
A situation in which some participants in a market have better information about market conditions than others.
Moral hazard
A situation in which a person who had taken out insurance is prone to taking more risk.
Adverse selection
A situation in which a person at risk is more likely to take out insurance.
Define information failure
Where consumers lack the full information about the costs and / or benefits of a good and therefore, make choices that fail to achieve allocative efficiency.