The subject of the study for this dissertation is the relationship between pricing and reserving risks for property-casualty insurance companies. Since the risk characteristics of insurers differ based on their structure, objectives and incentives, segmenting the insurers into subgroups would allow for a better understanding of group-specific risks. Based on this approach to analyzing insurer financial risks, we find that, in a given accident year, the pricing and reserving errors are positively correlated, especially in long-tailed lines of business. Large insurers, stock insurers, and multi-state insurers, in general, exhibit a strong correlation between accident-year price and reserve errors. However, only size of insurers appears to be a factor that influences the interaction between price changes and the calendar year loss reserve adjustments. Furthermore, we find that the pricing risk and reserving risk are marginally more homogenous within a market segment when size, type and number of states are employed as criteria for market segmentation, hence insurance regulators should consider the refined market segments for the RBC formula. The empirical results also indicate that, in general, Chain-Ladder reserving method likely contributes to loss reserve errors when there is a change in the loss development pattern and the magnitude of the errors is worse for large insurers. Finally, we find that our proposed measurement method for the product diversification benefit provides support for the notion that the diversification benefit on the incurred losses increases with the number of lines in the portfolio. Yet, the diminishing returns tend to decrease the diversification benefit on the incurred losses for insurers that write the business in more than six of the selected lines. To the contrary, our proposed measure does not provide clear evidence that writing business in many product lines increases the product diversification benefit with respect to adverse loss development. We do find that the diversification benefit for both incurred losses and loss development is higher for larger insurers. Hence, for risk management and regulatory purposes, a stronger case can be made for considering firm size than product diversification.

Submitted by Bruno Rodrigues Domingues (xistaum@hotmail.com) on 2013-03-04T01:01:01Z No. of bitstreams: 1 Dissertação_Verificação_ciclos_v5.pdf: 974726 bytes, checksum: d8c2d7df3a1ea76b56106d878af8ede0 (MD5) / Approved for entry into archive by Suzinei Teles Garcia Garcia (suzinei.garcia@fgv.br) on 2013-03-04T13:11:50Z (GMT) No. of bitstreams: 1 Dissertação_Verificação_ciclos_v5.pdf: 974726 bytes, checksum: d8c2d7df3a1ea76b56106d878af8ede0 (MD5) / Made available in DSpace on 2013-03-04T13:12:42Z (GMT). No. of bitstreams: 1 Dissertação_Verificação_ciclos_v5.pdf: 974726 bytes, checksum: d8c2d7df3a1ea76b56106d878af8ede0 (MD5) Previous issue date: 2013-02-05 / Este trabalho se propõe a avaliar a existência de ciclos de margem de subscrição no mercado segurador brasileiro para os grupos de ramos de automóvel, patrimonial, responsabilidade civil e transportes a partir de dados da SUSEP. É feita uma introdução em seguros, uma revisão dos artigos que foram realizados no mundo sobre o assunto assim como os estudos discorrendo sobre as possíveis causas para a existência destes ciclos. Em seguida são apresentadas as técnicas econométricas de séries de tempo estruturais e o teste HEGY utilizadas para a verificação dessa hipótese. Foram encontrados ciclos nos grupos de ramos de automóveis, patrimoniais e transportes e não encontramos evidências de ciclos para responsabilidade civil e nem para o agregado de ramos. Os resultados desse estudo sobre a existência, ou não dos ciclos, assim como sua duração considerando as particularidades de cada tipo de ramo, periodicidade das séries e utilização ou não da despesa de comercialização foram analisados para cada grupo de ramos, considerando suas particularidades. Finalmente se fez um comparativo dos resultados obtidos nesse estudo com o que está na literatura para diversos outros mercados de seguros de outros países. / This study examines the existence of underwriting cycles in the Brazilian insurance market for four lines of insurance: marine, property, motor and liability using data from SUSEP. An overview of insurance is given as well as a quick explanation of insurance accounting practices in Brazil. A review of the literature published over this subject and the possible causes of these cycles are provided as well. The econometrics techniques are presented and an alternative methodology for verifying cycles is proposed. The analyses of the results were made in two steps. First a comparison between the results per lines was made considering specificities of each line. The results were then compared with the results from other countries. Evidences of cycles were found for the automobile, marine and property lines, in contrast to liability and when the lines were aggregated.