Taxes on unhealthy food and externalities in the parental choice of children's diet
研究在不完全利他的父母决定子女饮食时，对不健康食品征税能否内部化代际外部性，发现最优税率虽为正但仅为次优，且可能过度或不足内部化边际损害。
This study examines whether taxes on unhealthy food are suitable for internalizing intergenerational externalities inflicted by parents when they decide on their children's diet. In an overlapping generations (OLG) model with an imperfectly altruistic parent, the optimal steady-state tax rate on unhealthy food is strictly positive. However, it is only second-best because, in addition to reducing unhealthy consumption by the child, it distorts the parent's unhealthy consumption. Surprisingly, the optimal tax may underinternalize or overinternalize the marginal damage.