We show how the scheme- and scale-dependence of the short-distance operator
product expansion with four-quark operators can be correctly accounted for
in the framework of the 1/N-c-expansion once the hadronization of two-quar
k currents has been fixed. We show formulas explicitly in the case of the B
K-parameter. We then use them together with our earlier estimates of the lo
ng-distance effects. We compare Chiral Perturbation Theory at Leading- and
Next-to-Leading-Order with the ENJL model results in the chiral limit. Good
matching between the long- and short-distance regimes is obtained and our
final value for the physical scheme independent (B) over cap (K) is 0.77 +/
- 0.05 +/- 0.5.