Polyhedral conditions for the nonexistence of the MLE for hierarchical log-linear models
Combinatorics
2007-06-13 v1 Statistics Theory
Statistics Theory
Abstract
We provide a polyhedral description of the conditions for the existence of the maximum likelihood estimate (MLE) for a hierarchical log-linear model. The MLE exists if and only if the observed margins lie in the relative interior of the marginal cone. Using this description, we give an algorithm for determining if the MLE exists. If the tree width is bounded, the algorithm runs in polynomial time. We also perform a computational study of the case of three random variables under the no three-factor effect model.
Keywords
Cite
@article{arxiv.math/0405044,
title = {Polyhedral conditions for the nonexistence of the MLE for hierarchical log-linear models},
author = {Nicholas Eriksson and Stephen E. Fienberg and Alessandro Rinaldo and Seth Sullivant},
journal= {arXiv preprint arXiv:math/0405044},
year = {2007}
}
Comments
15 pages