  We consider the evolution of cosmological perturbations during radion
stabilization, which we assume to happen after a period of inflation in the
early universe. Concentrating on the Randall-Sundrum brane world scenario, we
find that if matter is present both on the positive and negative tension
branes, the coupling of the radion to matter fields could have significant
impact on the evolution of the curvature perturbation and on the production of
entropy perturbations. We investigate both the case of a long-lived and
short-lived radion and outline similarities and differences to the curvaton
scenario.
