  The effective action of the linear meson model generates the mesonic n-point
functions with all quantum effects included. Based on chiral symmetry and a
systematic quark mass expansion we derive relations between meson masses and
decay constants. The model ``predicts'' values for f_eta and f_eta' which are
compatible with observation. This involves a large momentum dependent eta-eta'
mixing angle which is different for the on--shell decays of the eta and the
eta'. We also present relations for the masses of the 0^{++} octet. The
parameters of the linear meson model are computed and related to cubic and
quartic couplings among pseudoscalar and scalar mesons. We also discuss
extensions for vector and axialvector fields. In a good approximation the
exchange of these fields is responsible for the important nonminimal kinetic
terms and the eta-eta' mixing encountered in the linear meson model.
