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We present a new algorithm for improving retrieval results by combining document ranking functions: Condorcet-fuse. Beginning with one of the two major classes of voting procedures from Social Choice Theory, the Condorcet procedure, we apply a graph-theoretic analysis that yields a sortingbased algorithm that is elegant, efficient, and effective. The algorithm performs very well on TREC data, often outperforming existing metasearch algorithms whether or not relevance scores and training data isdoi:10.1145/584792.584881 dblp:conf/cikm/MontagueA02 fatcat:dcdlmo7r5nfzxdod3fjfrp72wu