Reciprocity is one of the most powerful — and least examined — forces shaping your financial life. When a waiter brings you a small gift with the bill, you tip more. When a vendor gives you a free sample, leaving without buying feels almost rude. Robert Cialdini documented this in his research on influence: gifts create invisible debts, and those debts quietly override your intentions. In Buenos Aires, where economic life is intensely relational — deals struck over coffee, loyalty to *el de confianza* over the cheaper option — this dynamic runs especially deep. The insight isn't that reciprocity is a trap to escape. It's that recognizing the debt before you feel it lets you choose whether it's worth honoring. Next time someone gives you something unexpectedly before asking, notice the small pull toward compliance before you decide anything.

Who in your life do you consistently give better terms to — financial or otherwise — primarily because they gave you something first?

Drawing from Social Psychology / Influence Research — Robert Cialdini