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ESTIMATING A PROBABILITY MASS FUNCTION WITH UNKNOWN LABELS
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DOI：10.1214/17-AOS1542.png)
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Abstract
En 中文
In the context of a species sampling problem, we discuss a nonparametric maximum likelihood estimator for the underlying probability mass function. The estimator is known in the computer science literature as the high profile estimator. We prove strong consistency and derive the rates of convergence, for an extended model version of the estimator. We also study a sieved estimator for which similar consistency results are derived. Numerical computation of the sieved estimator is of great interest for practical problems, such as forensic DNA analysis, and we present a computational algorithm based on the stochastic approximation of the expectation maximisation algorithm. As an interesting byproduct of the numerical analyses, we introduce an algorithm for bounded isotonic regression for which we also prove convergence.
Keywords:
NPMLE
high profile
probability mass function
strong consistency
sieve
ordered
monotone rearrangement
nonparametric
SA-EM
rates
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