The “progressive mixture” estimator for regression trees |
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Authors: | Gilles Blanchard |
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Institution: | DMI, École Normale Supérieure, 45 rue d'Ulm, 75230 Paris Cedex, France |
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Abstract: | We present a version of O. Catoni's “progressive mixture estimator” (1999) suited for a general regression framework. Following basically Catoni's steps, we derive strong non-asymptotic upper bounds for the Kullback–Leibler risk in this framework. We give a more explicit form for this bound when the models considered are regression trees, present a modified version of the estimator in an extended framework and propose an approximate computation using a Metropolis algorithm. |
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