Cognition and Perception Commons^™

Third Party Moral Hazard And The Problem Of Insurance Externalities, Gideon Parchomovsky, Peter Siegelman

All Faculty Scholarship

Insurance can lead to loss or claim-creation not just by insureds themselves, but also by uninsured third parties. These externalities—which we term “third party moral hazard”—arise because insurance creates opportunities both to extract rents and to recover for otherwise unrecoverable losses. Using examples from health, automobile, kidnap, and liability insurance, we demonstrate that the phenomenon is widespread and important, and that the downsides of insurance are greater than previously believed. We explain the economic, social and psychological reasons for this phenomenon, and propose policy responses. Contract-based methods that are traditionally used to control first-party moral hazard can be welfare-reducing in …

Why Do Retail Investors Make Costly Mistakes? An Experiment On Mutual Fund Choice, Jill E. Fisch, Tess Wilkinson-Ryan

All Faculty Scholarship

There is mounting evidence that retail investors make predictable, costly investment mistakes, including underinvestment, naïve diversification, and payment of excessive fund fees. Over the past thirty-five years, however, participant-directed 401(k) plans have largely replaced professionally managed pension plans, requiring unsophisticated retail investors to navigate the financial markets themselves. Policy-makers have struggled with regulatory interventions designed to improve the quality of investment decisions without a clear understanding of the reasons for investor mistakes. Absent such an understanding, it is difficult to design effective regulatory responses.

This article offers a first step in understanding the investor decision-making process. We use an internet-based …