Sequence-space models are becoming increasingly popular in macroeconomics, especially in the heterogeneous … state-space methods. This note introduces an algorithm for efficiently filtering unobserved shocks in linear sequence-space …

Biological evolution in a sequence space with random fitnesses is studied within Eigen's quasispecies model. A strong …

sequence space by diffusion analogous to the behavior of a quasispecies on a flat fitness landscape. The diffusion constant …