reciprocity

Definitions

Economics

  • noun an agreement between two countries to give each other similar terms of trade, which are not applied to other countries. It implies that the two countries treat each other’s citizens as they would their own.

Electronics

Law

Politics

  • noun an arrangement which applies when two people, countries or organisations give an equal amount of help to one another
http://www.dictionarycentral.com/definition/reciprocity.html