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Article Dans Une Revue The European Physical Journal B: Condensed Matter and Complex Systems Année : 2015

Statistical analysis of NOMAO customer votes for spots of France

Robert Palovics
  • Fonction : Auteur
Baliant Daroczy
  • Fonction : Auteur
Andras Benczur
  • Fonction : Auteur
Julia Pap
  • Fonction : Auteur
Leonardo Ermann
  • Fonction : Auteur
Samuel Phan
  • Fonction : Auteur
Dima Shepelyansky

Résumé

We investigate the statistical properties of votes of customers for spots of France collected by the startup company NOMAO. The frequencies of votes per spot and per customer are characterized by a power law distributions which remain stable on a time scale of a decade when the number of votes is varied by almost two orders of magnitude. Using the computer science methods we explore the spectrum and the eigenvalues of a matrix containing user ratings to geolocalized items. Eigenvalues nicely map to large towns and regions but show certain level of instability as we modify the interpretation of the underlying matrix. We evaluate imputation strategies that provide improved prediction performance by reaching geographically smooth eigenvectors. We point on possible links between distribution of votes and the phenomenon of self-organized criticality.

Dates et versions

hal-01151520 , version 1 (13-05-2015)

Identifiants

Citer

Robert Palovics, Baliant Daroczy, Andras Benczur, Julia Pap, Leonardo Ermann, et al.. Statistical analysis of NOMAO customer votes for spots of France. The European Physical Journal B: Condensed Matter and Complex Systems, 2015, 88, pp.194. ⟨10.1140/epjb/e2015-60357-1⟩. ⟨hal-01151520⟩
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