14. The computer system of claim 13 , wherein determining the first item further includes: creating a first combined score by combining the allocation score related to the first search index result set with the universal item score for a top order item listed in the first search index result set; creating a second combined score by combining the allocation score related to the second search index result set with the universal item score for a top order item listed in the second search index result set; and comparing the first combined score and the second combined score and selecting the top order item having a highest combined score.
15. The computer system of claim 14 , wherein computing an allocation score related to the first search index result set includes: determining a percentage of items listed in the universal query result set that are related to the first search index result set; and adjusting the allocation score related to the first search index result set based at least in part on the determined percentage of items listed in the universal query result set that are related to the first search index result set.