Why It Is Not Enough Just To Give Green OA Higher Weight Than Gold OA

MELIBEA's validator assesses OA policies using an algorithm that generates for each policy a one-dimensional measure, "OA%val," based on a number of weighted factors. In assigning weights to these factors it is it not just a matter of whether one puts a greater weight on green than on gold overall. The devil is in the details. Since MELIBEA's "OA%val" is one-dimensional, the exact weights assigned by the algorithm matter very much, for in some crucial combinations the "score" can be deleterious to green (and hence to OA itself) by assigning any non-zero weight at all to gold in an OA policy evaluation.