Stein's method for negative binomial and hyper-negative-binomial laws, with applications
Abstract
We develop Stein's method for the negative binomial law and for the hyper-negative-binomial law, the law of the smallest row total of an array of independent geometric variables given the differences of the row totals, with every constant explicit. The main instrument is a comparison of two biasings of the approximated variable, which cancels the rate term exactly at the matched parameter. We provide total variation bounds for sums of independent geometric variables at drifting parameters, for sums of dependent geometric variables (the Arratia-Goldstein-Gordon theorem with geometric summands and the Poisson law as an endpoint), and for Poisson mixtures; the exact conditional law of negative-binomial counts given their differences, with the Bessel law as its Poisson limit; and a dependency expansion for the column direction of a contingency table. A final section verifies every bound numerically, with one script per result.
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BibTeX
@misc{desalvo2026steins,
title = {{Stein's method for negative binomial and hyper-negative-binomial laws, with applications}},
author = {Stephen DeSalvo},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.00275},
eprint = {2611.00275},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.00275},
}
RIS
TY - UNPB
TI - Stein's method for negative binomial and hyper-negative-binomial laws, with applications
AU - Stephen DeSalvo
PY - 2026
DA - 2026/11/01
PB - arXiv
DO - 10.48550/arxiv.2611.00275
UR - https://arxiv.org/abs/2611.00275
AB - We develop Stein's method for the negative binomial law and for the hyper-negative-binomial law, the law of the smallest row total of an array of independent geometric variables given the differences of the row totals, with every constant explicit. The main instrument is a comparison of two biasings of the approximated variable, which cancels the rate term exactly at the matched parameter. We provide total variation bounds for sums of independent geometric variables at drifting parameters, for sums of dependent geometric variables (the Arratia-Goldstein-Gordon theorem with geometric summands and the Poisson law as an endpoint), and for Poisson mixtures; the exact conditional law of negative-binomial counts given their differences, with the Bessel law as its Poisson limit; and a dependency expansion for the column direction of a contingency table. A final section verifies every bound numerically, with one script per result.
ER -