  We present here a model of the exchange-correlation hole for strongly
correlated systems using a simple nonlocal generalization of the Wigner--Seitz
radius. The model behaves similarly to the strictly correlated electron
approach, which gives the infinitely correlated limit of density functional
theory. Unlike the strictly correlated method, however, the energies and
potentials of this model can be presently calculated for arbitrary geometries
in three dimensions. We discuss how to evaluate the energies and potentials of
the nonlocal model, and provide results for many systems where it is also
possible to compare to the strictly correlated electron treatment.
