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Existence of maximum likelihood estimates in exponential random graph models

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arxiv 2204.04757 v2 pith:RKQ3KNYY submitted 2022-04-10 math.ST math.OCmath.PRstat.TH

Existence of maximum likelihood estimates in exponential random graph models

classification math.ST math.OCmath.PRstat.TH
keywords exponentialgraphlikelihoodmaximummodelsrandomconvexergms
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We present a streamlined proof of the foundational result in the theory of exponential random graph models (ERGMs) that the maximum likelihood estimate exists if and only if the target statistic lies in the relative interior of the convex hull of the set of realizable statistics. .

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