Reciprocation Tendency

The deep human drive to repay in kind what another has provided—gifts, favors, concessions, and even harm. Reciprocation is so deeply wired that it can override rational self-interest: people will comply with large requests from someone who first made a small concession (door-in-the-face technique). Bevelin and Munger emphasize that reciprocity can be exploited to create a sense of obligation disproportionate to the initial gift.

When to use it

When building business relationships. When negotiating deals (make concessions strategically). When someone gives you an unexpected gift or favor (examine what obligation it creates). When designing customer loyalty programs.

How it can help

Powerful tool for relationship building, negotiation, and influence—but also a vulnerability to be aware of. Understanding reciprocity helps structure deals, build partnerships, and recognize when you're being manipulated through manufactured obligation.