Fairness Retaliation and Reciprocity

"A man ought to be a friend to his friend and repay a gift with gift. People should meet smiles with smiles and lies with treachery."(Fehr and Gaechter, from the Edda)

Reciprocity is considered distinct behavior from that which is classified as cooperative or retaliatory. Reciprocity deals with actions that are simply responses, rather than actions that will lead to future material gains.