Copyright © 2004 Elsevier Ltd All rights reserved.
Classical retrieval and overlap measures satisfy the requirements for rankings based on a Lorenz curve
Received 18 February 2004;
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Abstract
Classical information retrieval and overlap measures such as the Jaccard index, the Dice coefficient and Salton’s cosine measure can be characterized by Lorenz curves. This result demonstrates the existence of a formal link between information retrieval and the information sciences on the one hand, and concentration and diversity theory, as used, e.g., in social economics and ecology on the other.
Keywords: Information retrieval; Overlap studies; Presence–absence data; Jaccard coefficient; Salton’s cosine measure; Dice coefficient; Lorenz curves; Gini index






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