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<p><b>Abstract</b>—Ensemble learning strategies, especially Boosting and Bagging decision trees, have demonstrated impressive capacities to improve the prediction accuracy of base learning algorithms. Further gains have been demonstrated by strategies that combine simple ensemble formation approaches. In this paper, we investigate the hypothesis that the improvement in accuracy of multistrategy approaches to ensemble learning is due to an increase in the diversity of ensemble members that are formed. In addition, guided by this hypothesis, we develop three new multistrategy ensemble learning techniques. Experimental results in a wide variety of natural domains suggest that these multistrategy ensemble learning techniques are, on average, more accurate than their component ensemble learning techniques.</p>
Boosting, bagging, ensemble learning, committee learning, multiboosting, bias, variance, ensemble diversity.

G. I. Webb and Z. Zheng, "Multistrategy Ensemble Learning: Reducing Error by Combining Ensemble Learning Techniques," in IEEE Transactions on Knowledge & Data Engineering, vol. 16, no. , pp. 980-991, 2004.
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