A positive Borel measure mu on a domain Omega subset of C-n is said to
be in R(Omega), if point evaluations at every p is an element of Omeg
a are locally uniformly bounded in L(2)(mu)-norm. It is proved that th
e multiplication of a measure in R(Omega) by a function decreasing no
faster than a power of a holomorphic function produces a measure in R(
Omega). Some applications to classical Hardy and Bergman spaces are gi
ven.