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Full-Text Articles in Business
Simplified Portfolio Optimization Using Cramer’S Rule In Excel, Tom Arnold, Joseph Farizo, Terry D. Nixon
Simplified Portfolio Optimization Using Cramer’S Rule In Excel, Tom Arnold, Joseph Farizo, Terry D. Nixon
Finance Faculty Publications
The matrix algebra associated with finding minimum variance portfolio weights, mapping the efficient frontier, and determining the tangency portfolio weights is greatly simplified in Excel by applying Cramer’s Rule. Only a scant knowledge of linear algebra is necessary for producing a very intuitive presentation for a multi-asset portfolio. The technique is very easily replicated for an assignment or for providing a classroom resource.
Third Party Moral Hazard And The Problem Of Insurance Externalities, Gideon Parchomovsky, Peter Siegelman
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 …