The fractional moment method, which was initially developed in the discrete
context for the analysis of the localization properties of lattice random
operators, is extended to apply to random Schr\"odinger operators in the
continuum. One of the new results for continuum operators are exponentially
decaying bounds for the mean value of transition amplitudes, for energies
throughout the localization regime. An obstacle which up to now prevented an
extension of this method to the continuum is the lack of a uniform bound on the
Lifshitz-Krein spectral shift associated with the local potential terms. This
difficulty is resolved through an analysis of the resonance-diffusing effects
of the disorder.