  We present a mean field theory of composite fermion edge channel transport in
the fractional and integer quantum Hall regimes. An expression relating the
electro-chemical potentials of composite fermions at the edges of a sample to
those of the corresponding electrons is obtained and a plausible form is
assumed for the composite fermion Landau level energies near the edges. The
theory yields the observed fractionally quantized Hall conductances and also
explains other experimental results. We also discuss some experiments that are
relevant to the question whether fractional edge states in real devices should
be described as Fermi or Luttinger liquids.
