An Ounce of Prevention or a Pound of Cure? The Value of Health Risk Information
利用美国行政数据，研究发现家庭成员确诊慢性病后，亲属医疗支出增加10%，这主要源于健康风险信念更新，且多数人过度反应，抵消了知情决策的福利收益。
Abstract I examine how individuals learn about health risks from household health shocks using US administrative data. When a family member is diagnosed with a chronic condition, relatives increase healthcare spending by 10%, a response that would require price declines as large as 50% to justify on demand alone. I quantify the mechanisms behind these effects, showing they are most consistent with individuals updating their beliefs about health risks. I evaluate the welfare and efficiency implications of this learning using a structural approach. I find that the majority of individuals overreact to diagnoses, overweighting their ex-post risks and offsetting potential welfare gains from informed decision-making.