  The Dubna-Mainz-Taipei dynamical model for pion electromagnetic production,
which can describe well the existing data from threshold up to 1 GeV photon lab
energy, is presented and used to analyze the recent precision data in the
$\Delta$ region. We find that, within our model, the bare Delta is almost
spherical while the physical Delta is oblate. The deformation is almost
saturated by the pion cloud effects. We further find that up to Q^2 = 4.0
(GeV/c)^2, the extracted helicity amplitude A_{3/2} and A_{1/2} remain
comparable with each other, implying that hadronic helicity is not conserved at
this range of Q^2. The ratio E_{1+}/M_{1+} obtained show, starting from a small
and negative value at the real photon point, a clear tendency to cross zero,
and to become positive with increasing Q^2. This is a possible indication of a
very slow approach toward the pQCD region. Finally, we find that the bare
helicity amplitude A_{1/2} and S_{1/2}, but not A_{3/2}, starts exhibiting the
scaling behavior at about Q^2 \ge 2.5 (GeV/c)^2.
