Externalities

An externality is a side effect generated as a result of consumption or production choices by one individual or entity and involuntarily received by another individual or entity. The decision maker's analysis or calculation deliberately or inadvertently ignores the consequence. The decision maker avoids “internalizing” a particular consequence and thus externalizes any cost or benefit. The recipient bears the burden of a negative (i.e., costly) externality and gains the value of a positive (i.e., beneficial) externality.

A negative externality imposes a burden elsewhere while benefiting the source through avoidance (i.e., externalization) of a cost. A classic example is air or water pollution. The polluter damages someone else and thereby avoids the cost of pollution control. Negative externalities particularly raise important issues for business ethics and law. ...

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