  The predictive power of top-condensation models strongly depends on the
behaviour of higher dimensional operators. These are analyzed in this paper by
an extension of the standard renormalization group (RG) arguments which turns
out to be a surprisingly powerful tool. Top-condensation models intermediated
by underlying scalar exchange can be shown to be mere reparametrizations of the
standard model. Further on, RG-arguments show that dynamical vector states
cannot be lowered in top-condensation models. Finally we give a general
argument concerning the size of higher dimensional operators of heavy vector
exchange.
