Testing for Full Insurance Using Exogenous Information
利用非家庭决策变量的外生信息，强烈拒绝完全保险假说，发现家庭无法对冲与户主职业类别相关的失业率变化，并指出文献中常用的内生性假设可能存在问题。
Abstract We strongly reject the full-insurance hypothesis, using testing variables that are not decision variables for the households under investigation. We find that households are not insured against changes in the unemployment rate associated with the household head's occupational category. Using this exogenous information, we also investigate the appropriateness of exogeneity assumptions on idiosyncratic variables that have been used as testing variables in the full-insurance literature. It is shown that several exogeneity assumptions made in the existing literature are potentially problematic. KEY WORDS: Exogeneity assumptionsFull insuranceRisk sharingSectoral shocks