  In many applications, for example when computing statistics of fast
subsystems in a multiscale setting, we wish to find the stationary
distributions of systems of continuous time Markov chains. Here we present a
class of models that appears naturally in certain averaging approaches whose
stationary distributions can be computed explicitly. In particular, we study
continuous time Markov chain models for biochemical interaction systems with
non-mass action kinetics whose network satisfies a certain constraint.
Analogous with previous related results, the distributions can be written in
product form.
