Researchers develop an axiomatic framework to clarify which risk-sharing rules follow from commonly desired principles in risk pools, such as anonymity of participant and incident information, non-punitive processes, and fairness. They characterize simple rules--including uniform, mean-proportional, and covariance-based linear rules--by formal properties like reshuffling, source-anonymous contributions, and aggregate contributions. The framework also defines broad rule classes and introduces scenario-based rules for settings where probabilistic modeling is impractical.
Principles That Uniquely Determine Simple Risk-Sharing Rules
