Limiting behavior of the search cost distribution for the move-to-front rule in the stable case

Fabrizio Leisen, Antonio Lijoi and Christian Paroissin

Statistics & Probability Letters, 2011, vol. 81, issue 12, 1827-1832

Abstract: Move-to-front rule is a heuristic updating a list of n items according to requests. Items are required with unknown probabilities (or popularities). The induced Markov chain is known to be ergodic. A main problem is the study of the distribution of the search cost defined as the position of the required item. Here we first establish the link between two recent papers of Barrera and Paroissin and Lijoi and Pruenster that both extend the results proved by Kingman on the expected stationary search cost. By combining the results contained in these papers, we obtain the limiting behavior for any moments of the stationary search cost as n tends to infinity.

Keywords: Normalized random measure; Random discrete distribution; Stable subordinator; Problem of heaps (search for similar items in EconPapers)
Date: 2011
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DOI: 10.1016/j.spl.2011.07.016

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