Off-the-peg and bespoke classifiers for fraud detection

  • Authors:
  • Piotr Juszczak;Niall M. Adams;David J. Hand;Christopher Whitrow;David J. Weston

  • Affiliations:
  • Institute for Mathematical Sciences, Imperial College London, United Kingdom;Department of Mathematics, Imperial College London, SW7 2AZ London, United Kingdom;Institute for Mathematical Sciences, Imperial College London, United Kingdom and Department of Mathematics, Imperial College London, SW7 2AZ London, United Kingdom;Institute for Mathematical Sciences, Imperial College London, United Kingdom;Institute for Mathematical Sciences, Imperial College London, United Kingdom

  • Venue:
  • Computational Statistics & Data Analysis
  • Year:
  • 2008

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Abstract

Ever since the introduction of hidden Markov models by Baum and his co-workers, the method of choice for fitting such models has been maximum likelihood via the EM algorithm. In recent years it has been noticed that the gradient and Hessian of the log ...