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Novel Bernstein-like Concentration Inequalities for the Missing Mass
Proceedings of the 31st Conference on Uncertainty in Artificial Intelligence, PMLR R13:457-466, 2015.
Abstract
We are concerned with obtaining novel concentration inequalities for the missing mass, i.e. the total probability mass of the outcomes not observed in the sample. We not only derive - for the first time - distribution-free Bernstein-like deviation bounds with sublinear exponents in deviation size for missing mass, but also improve the results of McAllester and Ortiz (2003) and Berend and Kontorovich (2013, 2012) for small deviations which is the most interesting case in learning theory. It is known that standard inequalities can not be used to analyze heterogeneous distributions i.e. distributions whose bins have large difference in magnitude. Our generic and intuitive approach shows that the heterogeneity issue introduced in McAllester and Ortiz(2003) is resolvable at least in the case of missing mass via regulating the terms using our novel thresholding technique.