The 2007 Historical Loss Development Study presents historical loss development patterns in companies writing casualty excess reinsurance for automobile liability, general liability, medical malpractice and workers compensation.
The study, which has been produced biennially since 1969, presents the historical loss development by accident year for each of four major lines of insurance. Historical loss development is also presented separately for treaty versus facultative business, and separately by range of attachment point. The data presented consists of composites of the historical loss development of a broad cross-section of reinsurers who submitted data. The study discusses how loss development patterns have changed over the last few years, and suggests possible reasons for those changes, and also discusses how loss development has varied depending on the circumstances and the nature of the business being considered.
