4 Dec 2012

Tune Your Engine - The Rule of Reciprocation

From Afternoons with Jesse Mulligan, 3:06 pm on 4 December 2012

There is an unwritten rule about the humble holiday greeting card. If you get one, most of us feel compelled to give one, even to people who are no longer part of our daily lives. It's called the rule of reciprocation and it can be tremendously powerful according to sociologists.

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