POLARIZATION EFFECTS IN E+E--]W+W-

We investigate longitudinal and transverse beam polarization in e+e- --> W+W- including electroweak radiative corrections and hard bremsstrahlung. Also final state polarizations are discussed. We show that the transverse beam polarization allows to study the most interesting longitudinal-longitudinal final state polarization without looking at the polarization of the final state particles. However, to detect possible small deviations from the standard model a high luminosity e+e--collider, with energy scan from the peak of the cross-section up to about 300 GeV, is necessary.