The Laplace Motion in Phylogenetic Comparative Methods
  The majority of current phylogenetic comparative methods assume that the stochastic evolutionary process is homogeneous over the phylogeny or offer relaxations of this in rather limited and usually parameter expensive ways. Here we make a preliminary investigation, by means of a numerical experiment, whether the Laplace motion process can offer an alternative approach. 
Krzysztof Bartoszek
q-bio.PE math.PR stat.AP stat.CO