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保险中的道德风险:来自加纳一项信贷改革的理论与证据

Moral hazard in insurance: Theory and evidence from a credit reform in Ghana
Journal of Public Economics · 2022 · Francis Annan

中文摘要

在发展中国家帮助个体购买保险保障,例如允许其赊购保险,可能会诱发更多风险行为。利用加纳汽车保险市场的丰富行政数据,以及一项因禁止个体赊购保险而导致需求大幅下降的政策改革,我为道德风险的存在提供了非参数证据,并估算了其在该市场所造成成本的下界。估计的道德风险成本达到企业利润的12%。这些结果对市场间联动、捆绑销售与信贷约束的研究具有重要意义。

Abstract

Helping individuals to buy insurance coverage in developing countries, for instance by allowing them to buy insurance on credit, may induce more risky behavior. Using rich administrative data on auto-insurance market in Ghana, and a policy reform that led to sizable reduction in demand by disallowing individuals to buy insurance on credit, I provide non-parametric evidence for the existence of moral hazard and recover lower bounds on the costs it imposes in this market. The estimated cost of moral hazard reach 12% of firm profits. The results have important implications for the study of market inter-linkages, bundling and credit-constraints.
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