Glossary of Terms

Externality 2019-08-10 08:00:00

Externality

Externality is an economic term that describes a third-party factor that has a positive or negative impact on an individual or firm where the third party factor has no direct control over the creation of a cost or benefit. 

The impact that positive net migration to a particular market in the United States has on property values is an example of a positive externality. The impact of an uptick in crime in a particular neighborhood has on the value of homes in that area is an example of a negative externality.