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.
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. 16. The computer system of claim 15 , wherein adjusting the allocation score includes: reducing the allocation score if there is a high percentage of items listed in the universal query result set that are related to the first search index result set.