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arXiv 1808.10092math.STstat.TH
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参数随机环境下$(L,1)$随机游动的极大似然估计及其相合性

Maximum likelihood estimator and its consistency for an $(L,1)$ random walk in a parametric random environment

Hua-Ming Wang, Meijuan Zhang

摘要:

考虑在i.i.d.中的$(L,1)$随机游动。随机环境,其环境包含一定的参数。我们得到了环境参数的极大似然估计,它可以表示为随机环境中带移民的多型分支过程的泛函。由于所涉及的多型BPIRE的后代分布是线性分式的,因此可以显式地计算多型BPIRE的极限不变分布。结果,我们得到了MLE的一致性。我们的结果是Comets等人[随机过程]的推广。2014,124,268-288]。

英文摘要:

Consider an $(L,1)$ random walk in an i.i.d. random environment, whose environment involves certain parameter. We get the maximum likelihood estimator(MLE) of the environment parameter which can be written as functionals of a multitype branching process with immigration in a random environment(BPIRE). Because the offspring distributions of the involved multitype BPIRE are of the linear fractional type, the limit invariant distribution of the multitype BPIRE can be computed explicitly. As a result, we get the consistency of the MLE. Our result is a generalization of Comets et al. [Stochastic Process. Appl. 2014, 124, 268-288].

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