  The Trojan Horse (TH) method is a powerful indirect technique that provides
information to determine astrophysical factors for rearrangement processes at
astrophysically relevant energies. A short coming for understanding the
reliability of the technique has been determining the importance of nuclear and
Coulomb effects on the energy dependence of the yield. Using a simple model, we
demonstrate that off-energy-shell and Coulomb effects in the entry channel and
the final state nuclear interactions do not change the energy dependence of the
astrophysical factor extracted from the TH reaction. Some examples are
presented.
