A stochastic theory of combined radiative and nonradiative transport is presented. The stochastic approach is physically clear and versatile, allowing the consideration of the combined effect of radiative and nonradiative transport, carried out here for the first time. The stochastic approach is formulated for delta-pulse excitation and for the photostationary state. General equations for the intensity. polarization, and anisotropy decays are derived. (C) 1997 American Institute of Physics.