Ruin probability Appell polynomials (Mixed) Poisson process Actuarial science Approximation by branching Archimedean copulas Best paper prize Block-structured Markov processes Compound Poisson risk model Deficit at ruin Discrete models Discrete time risk model Editorial Exchangeable random variables Final population state Finite or infinite horizon Finite-time horizon Generalized Appell (Sheffer) polynomials Insurance Interdependent claim severities Linear birth process with immigration Linear death process Matrix-analytic methods More for Less strategy Non-constant premium Non-homogeneous Markov chain Non-stationary claim arrivals Order statistics Path integrals Probabilities of ruin