Bretó, Carles; Ionides, Edward L. - Departamento de Estadistica, Universidad Carlos III de … - 2011
We propose an infinitesimal dispersion index for Markov counting processes. We show that, under standard moment existence conditions, a process is infinitesimally (over-) equi-dispersed if, and only if, it is simple (compound), i.e. it increases in jumps of one (or more) unit(s), even though...