  We study the different linear collider modes with regard to the determination
of the gaugino mass parameter M_1. In a specific mSUGRA inspired scenario we
compare four processes with polarized beams: (a) e+ e- --> neutralino_1
neutralino_2 --> neutralino_1 neutralino_1 e+ e-, (b) e- gamma --> neutralino_1
selectron_{L/R} --> neutralino_1 neutralino_1 e-, (c) gamma gamma -->
chargino_1^+ chargino_1^- --> neutralino_1 neutralino_1 e+ e- neutrino_e
anti-neutrino_e, (d) e- e- --> selectron_{L/R} selectron_{L/R} --> neutralino_1
neutralino_1 e- e-.
