The Economics of Property-Casualty Insurance presents new research and findings on key aspects of the economics of the property-casualty insurance industry. The volume explores the industrial organization, regulation, financing, and taxation of this business. The first paper, on external financing and insurance cycles, contains a wealth of information on trends and patterns in the industry's financial structure. The last essay, which compares performance of stock and mutual insurance companies, takes a fresh look at the way a company's organizational structure affects its responses to different economic situations. Two papers focus on rate regulation in the auto insurance industry, and provide broad overviews of the structure and economics of the insurance industry as a whole. Also addressed are the system of regulating insurance companies in the United States, who insures the insurers, and the effects of tax law changes in the 1980s on the prices of insurance policies.

Economic and financial research on insurance markets has undergone dramatic growth since its infancy in the early 1960s. Our main objective in compiling this volume was to achieve a wider dissemination of key papers in this literature. Their significance is highlighted in the introduction, which surveys major areas in insurance economics. While it was not possible to provide comprehensive coverage of insurance economics in this book, these readings provide an essential foundation to those who desire to conduct research and teach in the field. In particular, we hope that this compilation and our introduction will be useful to graduate students and to researchers in economics, finance, and insurance. Our criteria for selecting articles included significance, representativeness, pedagogical value, and our desire to include theoretical and empirical work. While the focus of the applied papers is on property-liability insurance, they illustrate issues, concepts, and methods that are applicable in many areas of insurance. The S. S. Huebner Foundation for Insurance Education at the University of Pennsylvania's Wharton School made this book possible by financing publication costs. We are grateful for this assistance and to J. David Cummins, Executive Director of the Foundation, for his efforts and helpful advice on the contents. We also wish to thank all of the authors and editors who provided permission to reprint articles and our respective institutions for technical and financial support.

The First International Conference on Insurance Solvency was held at the Wharton School, University of Pennsylvania from June 18th through June 20th, 1986. The conference was the inaugural event for Wharton's Center for Research on Risk and Insurance. In atten dance were thirty-nine representatives from Australia, Canada, France, Germany, Israel, the United Kingdom, and the United States. The papers presented at the Conference are published in two volumes, this book and a companion volume, Classical Insurance Solvency Theory, J. D. Cummins and R. A. Derrig, eds. (Norwell, MA: Kluwer Academic Publishers, 1988). The first volume presented two papers reflecting important advances in actuarial solvency theory. The current volume goes beyond the actuarial approach to encom pass papers applying the insights and techniques of financial economics. The papers fall into two groups. The first group con sists of papers that adopt an essentially actuarial or statistical ap proach to solvency modelling. These papers represent methodology advances over prior efforts at operational modelling of insurance companies. The emphasis is on cash flow analysis and many of the models incorporate investment income, inflation, taxation, and other economic variables. The papers in second group bring financial economics to bear on various aspects of solvency analysis. These papers discuss insurance applications of asset pricing models, capital structure theory, and the economic theory of agency.

This dissertation consists of two topics. Chapter 1 explores the relationship between U.S. Property-Casualty (P/C) insurers' underwriting risk, investment risk, and leverage risk, using data from 1998 to 2013. I test the trade-off hypothesis using a simultaneous equation model framework with partial adjustment effects. The three equations model intend to examine the interrelations between insurers' leverage and two measures of firm risks: underwriting risk and investment risk. The empirical evidence, various to different sample periods and model specifications, suggests there is no significant relationship existing between insurers' underwriting risk and investment risk. But these two types of risks are both significantly and negatively related to the leverage ratio. The overall results imply that insurers tend to tradeoff leverage risk and underwriting risk/investment risk, but it appears that they have not taken an integrated approach between the total level of underwriting risk and investment risk yet. The second part of this dissertation empirically investigates the impact of credit risk on insurers' reinsurance demand, using data on the U.S. P/C insurance industry from 2000 to 2014. I mainly explore how insurers' credit rating status and downgrade risk affects their reinsurance demand. Using a two-stage least square (2SLS) regression model, I find that low-rated insurers are associated with a higher utilization of reinsurance. In addition, insurers that are downgraded in the previous year tend to have a higher reinsurance demand than the others. Results also show that downgraded group-affiliated insurers tend to significantly increase their internal reinsurance demand from the group-affiliated members while decreasing the purchase of external reinsurance significantly. In general, I find that insurers' reinsurance demand is affected by their credit rating and downgrade risk.

In the 1990s, large insurance companies failed in virtually every major market, prompting a fierce and ongoing debate about how to better protect policyholders. Drawing lessons from the failures of four insurance companies, When Insurers Go Bust dramatically advances this debate by arguing that the current approach to insurance regulation should be replaced with mechanisms that replicate the governance of non-financial firms. Rather than immediately addressing the minutiae of supervision, Guillaume Plantin and Jean-Charles Rochet first identify a fundamental economic rationale for supervising the solvency of insurance companies: policyholders are the "bankers" of insurance companies. But because policyholders are too dispersed to effectively monitor insurers, it might be efficient to delegate monitoring to an institution--a prudential authority. Applying recent developments in corporate finance theory and the economic theory of organizations, the authors describe in practical terms how such authorities could be created and given the incentives to behave exactly like bankers behave toward borrowers, as "tough" claimholders.

This is the first comprehensive study of the history, politics, and economics of the insurance industry in the United States. It is designed as a theoretical challenge to the conventional wisdom in political economy which says that regulation benefits the regulated. In fact, Meier shows that because the insurance industry is far too divided to impose its will on the regulatory system, the political economy of regulation is actually the product of a complex interaction of industry interests, consumer groups, insurance regulations, and political elites. Using both historical and quantitative approaches, the author examines a variety of insurance issues including the development of insurance regulation; the impact of regulation on the availability and price of insurance; the stringency of state regulation; and the product liability insurance crisis of 1985-86. The book concludes with a series of recommendations for reforming the regulation of insurance.