  The effect of non-locality in the NN interaction models is examined. It is
shown that this feature can explain differences in predictions made from models
evidencing a difference with this respect. This is done for both static and
dynamical observables, taking into account that a non-local term can be
transformed away by performing a unitary transformation. Some results for the
deuteron form factors, the A(Q^2) structure function and the T_{20}(Q^2) tensor
polarization are given as an example. A few cases where discrepancies cannot be
explained are also considered. They point to differences in the models as for
the deuteron asymptotic normalizations, A_S and A_D, which are not affected by
the present analysis.
