Present bias for monetary and dietary rewards
通过一项针对697名中国低收入高中生的纵向实验，比较了货币与健康/不健康食品奖励的现时偏向，发现两种奖励均存在强现时偏向，且个体偏向在不同奖励类型间中度相关，并能预测饮酒和学业表现等实际行为。
Abstract Economists model self-control problems through time-inconsistent preferences. Empirical tests of these preferences largely rely on experimental elicitation using monetary rewards, with several recent studies failing to find present bias for money. In this paper, we compare estimates of present bias for money with estimates for healthy and unhealthy foods. In a within-subjects longitudinal experiment with 697 low-income Chinese high school students, we find strong present bias for both money and food, and that individual measures of present bias are moderately correlated across reward types. Our experimental measures of time preferences over both money and foods predict field behaviors including alcohol consumption and academic performance.