8. The method of claim 7 , wherein the value comprises a value matrix providing value scores for the value of presenting a given advertisement to each of the job candidates, the value scores calculated based on the relevance scores.
8. The method of claim 7 , wherein the value comprises a value matrix providing value scores for the value of presenting a given advertisement to each of the job candidates, the value scores calculated based on the relevance scores. 9. The method of claim 8 , wherein the value is calculated in terms of supply and demand, where supply equals a sum of the relevance scores of the job candidates against each advertisement, where demand equals a sum of the relevance scores of each advertisement against the job candidates, and where supply and demand are inversely related.