Description: This article discusses the concept of Conservation of Mortality ("Conservation"). Conservation is the modeling principle that ensures consistency between assumptions of the total mortality of a population and mortality among population subsets. This article discusses the use cases for Conservation and the many ways that one could implement it in a model or an experience study. This article also discusses the potential issues that arise when using Conservation, and how one might solve or alleviate these issues.

Description: After research involving auto insurance is retracted due to fraud, I revisit my own book review and unskeptical quoting of that now-debunked research. A lesson in ASOP 23, on Data Quality, ensues, as it seems data in the research was falsified. There is also a lesson in ASOP 56, Modeling, which includes aspects of relying on outside experts for model input. At the end of it all, the value of our actuarial professional standards, in light of other professions seemingly having no standards (or no serious repercussions for breaching said standards), shines through. Also, be skeptical of 'one simple trick' approaches to transform the insurance industry.