  We pursue the issue of the local quark-hadron duality at high energies in
two- and four-dimensional QCD. A mechanism of the dynamical realization of the
quark-hadron duality in two-dimensional QCD in the limit of large number of
colors, $N_c \to \infty$, (the ' t Hooft model) is investigated. We argue that
a similar mechanism of dynamical smearing may be relevant in four-dimensional
QCD. Although particular details of our results are model-dependent (especially
in the latter case), the general features of the duality implementation
conjectured previously get further support.
