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We consider the quasiparticle properies such as the effective mass
ans spin susceptibility of quasi-two dimensional electron systems.
The finite quantum well width effects are incorporated into the
local-field factors that describe the charge and spin
correlations. We employ the Fermihypernetted chain formalism in
conjunction with fluctuation-dissipation theorem to obtain the
localfield factors. Our results are in good agreement with recent
experiments.
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