Vote-Buying and Reciprocity
研究发现，政客会利用人们内化的互惠规范来买票，收到钱后产生的义务感使互惠倾向高的人更可能被选为目标。
While vote-buying is common, little is known about how politicians determine who to target. We argue that vote-buying can be sustained by an internalized norm of reciprocity. Receiving money engenders feelings of obligation. Combining survey data on vote-buying with an experiment-based measure of reciprocity, we show that politicians target reciprocal individuals. Overall, our findings highlight the importance of social preferences in determining political behavior.