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Genetically Engineered Decision Trees: Population Diversity Produces Smarter Trees

Author

Listed:
  • Zhiwei Fu

    (Fannie Mae, 4000 Wisconsin Avenue NW, Washington, DC 20016)

  • Bruce Golden

    (Robert H.Smith School of Business, University of Maryland, College Park, Maryland 20742)

  • Shreevardhan Lele

    (Robert H.Smith School of Business, University of Maryland, College Park, Maryland 20742)

  • S. Raghavan

    (Robert H.Smith School of Business, University of Maryland, College Park, Maryland 20742)

  • Edward Wasil

    (Kogod School of Business, American University, Washington, DC 20016)

Abstract

When considering a decision tree for the purpose of classification, accuracy is usually the sole performance measure used in the construction process. In this paper, we introduce the idea of combining a decision tree's expected value and variance in a new probabilistic measure for assessing the performance of a tree. We develop a genetic algorithm for constructing a tree using our new measure and conduct computational experiments that show the advantages of our approach. Further, we investigate the effect of introducing diversity into the population used by our genetic algorithm. We allow the genetic algorithm to simultaneously focus on two distinct probabilistic measures---one that is risk averse and one that is risk seeking. Our bivariate genetic algorithm for constructing a decision tree performs very well, scales up quite nicely to handle data sets with hundreds of thousands of points, and requires only a small percent of the data to generate a high-quality decision tree. We demonstrate the effectiveness of our algorithm on three large data sets.

Suggested Citation

  • Zhiwei Fu & Bruce Golden & Shreevardhan Lele & S. Raghavan & Edward Wasil, 2003. "Genetically Engineered Decision Trees: Population Diversity Produces Smarter Trees," Operations Research, INFORMS, vol. 51(6), pages 894-907, December.
    • Handle: RePEc:inm:oropre:v:51:y:2003:i:6:p:894-907
    DOI: 10.1287/opre.51.6.894.24919
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    References listed on IDEAS

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    1. Zhiwei Fu & Bruce L. Golden & Shreevardhan Lele & S. Raghavan & Edward A. Wasil, 2003. "A Genetic Algorithm-Based Approach for Building Accurate Decision Trees," INFORMS Journal on Computing, INFORMS, vol. 15(1), pages 3-22, February.
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    Cited by:

    1. Olafsson, Sigurdur & Li, Xiaonan & Wu, Shuning, 2008. "Operations research and data mining," European Journal of Operational Research, Elsevier, vol. 187(3), pages 1429-1448, June.

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