  Above the Kondo temperature, the Kohn-Sham zero-bias conductance of an
Anderson junction has been shown to completely miss the Coulomb blockade.
Within a standard model for the spectral function, we deduce a parameterization
for both the onsite exchange-correlation potential and the bias drop as a
function of the site occupation that applies for all correlation strengths. We
use our results to sow doubt on the common interpretation of such corrections
as arising from dynamical exchange-correlation contributions.
