  It is shown that Wen's effective theory correctly describes the
Tomonaga-Luttinger liquid at the edge of a system of non-interacting composite
fermions. However, the weak residual interaction between composite fermions
appears to be a relevant perturbation. The filling factor dependence of the
Tomonaga-Luttinger parameter is estimated for interacting composite fermions in
a microscopic approach and satisfactory agreement with experiment is achieved.
It is suggested that the electron field operator may not have a simple
representation in the effective one dimensional theory.
