Suppose that a group of agents having divergent expectations can share risks efficiently. We examine how this group should behave collectively to manage these risks. We show that the beliefs of the representative agent is in general a function of the group.s wealth level, or equivalently, that...

The risk of counterparty default in banking, insurance, institutional, and pension-fund portfolios is an area of ongoing and increasing importance for finance practitioners. It is, unfortunately, a topic with a high degree of technical complexity. Addressing this challenge, this book provides a...

1 Introduction -- 2. Financial Institutions : A Regulation review through the Risk Measurement prism -- 3. The Traditional Risk measures -- 4. Univariate and Multivariate Distributions -- 5. Extensions for Risk Measures: Univariate and Multivariate Approaches -- 6. Risks Measures and Dynamics --...

This paper rationalizes the LASSO algorithm based on uncertain fat-tail priors and max-min robust optimization. Our rationalization excludes heuristic learning or restrictive prior assumptions in the original interpretation of LASSO (Tibshirani (1996)). In our setting, economic agents...