BASIC RATEMAKING Fifth Edition, May 2016
BASIC RATEMAKING Fifth Edition, May 2016 Geoff Werner, FCAS, MAAA Claudine Modlin, FCAS, MAAA Willis Towers Watson With significant contributions from: Alice Gannon, FCAS, MAAA; Serhat Guven, FCAS, MAAA; Christine Gennett, ACAS, MAAA; Jeff Kucera, FCAS, MAAA; Brett Nunes, ASA, MAAA; and Dave Otto, FCAS, MAAA © Casualty Actuarial Society, 2016 Basic Ratemaking Geoff Werner, FCAS, MAAA and Claudine Modlin, FCAS, MAAA Willis Towers Watson With significant contribution from: Alice Gannon, FCAS, MAAA; Serhat Guven, FCAS, MAAA; Christine Gennett, ACAS, MAAA; Jeff Kucera, FCAS, MAAA; Brett Nunes, ASA, MAAA; Dave Otto, FCAS, MAAA VERSION 5, MAY 2016 © Copyright Casualty Actuarial Society, 2016 This text outlines basic property/casualty insurance ratemaking concepts and techniques. It is intended to be a single educational text to prepare actuarial candidates practicing around the world for basic ratemaking. A key concept in the text is the fundamental insurance equation, which balances the expected future income and outgo of an insurance operation. Various chapters discuss the individual components of the equation (e.g., premium, loss, expense, profit), and other chapters review how to assess whether the equation is in balance in the aggregate and by customer segment. The text focuses on quantitative analysis as well as practical considerations in the ratemaking process. Finally, the text provides consistent definitions of terms and examples that underlie the ratemaking techniques discussed. i FOREWORD Ratemaking is a key driver of property and casualty (P&C) insurance profitability and hence a primary actuarial responsibility. Actuaries employ a variety of ratemaking techniques depending on specific circumstances. For example, techniques used to price short-tailed lines of insurance (e.g., personal automobile) are different than techniques used in long-tailed lines (e.g., workers compensation).
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