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Estimation of entropy-type integral functionals

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  • David Källberg
  • Oleg Seleznjev

Abstract

Entropy-type integral functionals of densities are widely used in mathematical statistics, information theory, and computer science. Examples include measures of closeness between distributions (e.g., density power divergence) and uncertainty characteristics for a random variable (e.g., Rényi entropy). In this paper, we study U-statistic estimators for a class of such functionals. The estimators are based on ε-close vector observations in the corresponding independent and identically distributed samples. We prove asymptotic properties of the estimators (consistency and asymptotic normality) under mild integrability and smoothness conditions for the densities. The results can be applied in diverse problems in mathematical statistics and computer science (e.g., distribution identification problems, approximate matching for random databases, two-sample problems).

Suggested Citation

  • David Källberg & Oleg Seleznjev, 2016. "Estimation of entropy-type integral functionals," Communications in Statistics - Theory and Methods, Taylor & Francis Journals, vol. 45(4), pages 887-905, February.
    • Handle: RePEc:taf:lstaxx:v:45:y:2016:i:4:p:887-905
    DOI: 10.1080/03610926.2013.853789
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