Obesity, sedentary behavior and lifestyle: A lifecycle model of eating and physical activity
构建了一个理论模型，研究个人根据自身体能和体重选择卡路里摄入与身体活动的生命周期决策，发现久坐可能是理性选择，并解释了多重均衡与补偿性干预的理论基础。
We propose a theoretical model to study individual lifestyle choices related to calorie intake and physical activity, depending on personal fitness and body weight. The model builds on the rational eating literature and can generate a variety of behaviors that are consistent with the empirical evidence. In particular, we show that engaging in periods of a sedentary lifestyle can be a rational, utility-maximizing decision—a finding that is not present in the existing literature but is empirically widespread. Additionally, we show the possible existence of multiple equilibria and multiple indifferent lifestyles. The former justifies policy interventions to help individuals exit a self-reinforcing, but unhealthy equilibrium; the latter provides a theoretical basis for remediation plans that compensate for earlier unhealthy behaviors.