  We establish the main features of homogeneous and isotropic dilaton, metric
and Yang-Mills field configurations in a cosmological framework. Special
attention is paid to the energy exchange between the dilaton and the Yang-Mills
field and, in particular, a new energy exchange term is identified.
Implications for the Polonyi problem in 4-dimensional string models and in
dynamical supersymmetry breaking scenarios are discussed.

General Relativity and Quantum Cosmology