Economics
Vote Trading Dynamics in Logrolling
Quick fact
Logrolling can lead to outcomes where every legislator votes for bills they personally dislike, and the final legislative package is something no single voter would have chosen, yet all participants benefit from the exchange.
Why this is interesting
You'd expect a bill that benefits only a small group and harms everyone else would never pass. Yet in legislatures, such bills routinely pass—thanks to a quiet back-scratching system known as logrolling.