正式保险对非正式风险分担机制的挤出效应——一个实验研究

发布时间：2018-05-24 21:52

本文选题：非正式风险分担 + 正式保险　；参考：《金融研究》2014年02期

【摘要】：推广正式保险往往被认为能够增加目标人群的福利。然而,本文在理论上证明,在异质性风险下,正式保险的引入常常会使得风险覆盖度变小而降低福利。这是因为先前存在的非正式风险分担机制可能会被过度挤出。为了避免实际中保险被引入的内生性问题,我们设计了一个实验来研究挤出效应和福利变化。我们观察到明显的挤出效应,但并不存在如理论所预测的过度挤出和风险覆盖率下降。然而,我们也发现挤出效应的大小和收入差距相关。收入差距过大会导致挤出过大而风险覆盖率不变。这使得引入正式保险的政策并没有产生预期的效果。这些发现为政策制定提供了一定的依据。
[Abstract]:The promotion of formal insurance is often considered to increase the welfare of the target population. However, this paper theoretically proves that under heterogeneous risks, the introduction of formal insurance often reduces risk coverage and benefits. This is because the existing informal risk-sharing mechanism may be overcrowded out. In order to avoid the endogenous problem of insurance in practice, we designed an experiment to study the crowding-out effect and welfare change. We have observed obvious extrusion effect, but there is no over-extrusion and risk coverage decrease as predicted by theory. However, we also found that the size of the crowding-out effect is related to the income gap. The income gap is too large and the risk coverage is unchanged. This led to the introduction of formal insurance policy and did not have the desired effect. These findings provide a basis for policy making.
【作者单位】：北京大学光华管理学院;皮茨堡大学经济系;
【基金】：国家自然科学基金(No.70903003和No.71073002);国家自然科学基金(No.71103003) 教育部人文社科基金(13YJA790064)的资助北京高等学校青年英才计划(YETP0040)的资助 “数量经济与数理金融教育部重点实验室(北京大学)”对本研究的支持
【分类号】：F842

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