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Information Processing & Management
Volume 42, Issue 1, January 2006, Pages 106-120
Formal Methods for Information Retrieval
 
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doi:10.1016/j.ipm.2004.05.004    How to Cite or Link Using DOI (Opens New Window)
Copyright © 2004 Elsevier Ltd All rights reserved.

Classical retrieval and overlap measures satisfy the requirements for rankings based on a Lorenz curve

Leo Egghea, b, E-mail The Corresponding Author and Ronald Rousseaub, c, Corresponding Author Contact Information, E-mail The Corresponding Author

aLUC, Universitaire Campus, B-3590 Diepenbeek, Belgium bUA, IBW, Universiteitsplein 1, B-2610 Wilrijk, Belgium cKHBO, IWT, Zeedijk 101, B-8400 Oostende, Belgium

Received 18 February 2004; 
accepted 14 May 2004. 
Available online 13 July 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

Article Outline

1. Introduction
2. Lorenz similarity curves
2.1. Construction of Lorenz curves for duo similarity
3. The partial order derived from Lorenz similarity curves
4. General properties of Lorenz similarity
4.1. Considerations related to smallest and largest similarity
5. Lorenz similarity functions
5.1. The Gini similarity measure
6. The relation between retrieval and overlap measures, and Lorenz similarity
7. Conclusion
Appendix A. Appendix
References






Information Processing & Management
Volume 42, Issue 1, January 2006, Pages 106-120
Formal Methods for Information Retrieval
 
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