We define a class of distributions, containing the classical Dirichlet
and Liouville distributions, in which the random variables take value
s in a locally compact Abelian group or semigroup. These generalizatio
ns retain many properties of the Dirichlet and Liouville distributions
, including properties of the marginal and conditional distributions a
nd regression functions. We present a number of examples illustrating
the general theory. (C) 1995 Academic Press, Inc.