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Machine learning approaches to outlier detection

ByAbdal Chaudhry, Miruna Dudceac, and Michael Leitschkis
15 December 2021

A brute-force nested simulations approach to capture risk interdependencies is infeasible with current resources available to insurers. It would require 1,000 or more risk-neutral simulations to produce a single stochastic scenario of the full risk distribution. This paper delves into finding an automated way to identify and remove outliers. We discuss the following: 

  • A simple outlier deletion technique and its limitations
  • A powerful method known as Cook’s distance
  • A few alternative machine learning approaches
  • Conclusions and areas for further research

Abdal Chaudhry

Miruna Dudceac

Michael Leitschkis

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