Optimal Defaults with Normative Ambiguity
研究了当政策制定者不清楚默认效应反映的是偏好还是错误时，如何设计最优政策，发现不解决这种模糊性就无法确定政策方向，并用养老金缴款数据说明。
Abstract Default effects are pervasive, but the reason they arise is often unclear. We study optimal policy when the planner does not know whether an observed default effect reflects a welfare-relevant preference or a mistake. Within a broad class of models, we find that determining optimal policy is impossible without resolving this ambiguity. Depending on the resolution, optimal policy tends in opposite directions: either minimizing the number of nondefault choices or inducing active choice. We show how these considerations depend on whether active choosers make mistakes when selecting among nondefault options. We illustrate our results using data on pension contribution defaults.