کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1146153 957497 2010 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Marginal parameterizations of discrete models defined by a set of conditional independencies
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات آنالیز عددی
پیش نمایش صفحه اول مقاله
Marginal parameterizations of discrete models defined by a set of conditional independencies
چکیده انگلیسی

It is well-known that a conditional independence statement for discrete variables is equivalent to constraining to zero a suitable set of log–linear interactions. In this paper we show that this is also equivalent to zero constraints on suitable sets of marginal log–linear interactions, that can be formulated within a class of smooth marginal log–linear models. This result allows much more flexibility than known until now in combining several conditional independencies into a smooth marginal model. This result is the basis for a procedure that can search for such a marginal parameterization, so that, if one exists, the model is smooth.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Multivariate Analysis - Volume 101, Issue 10, November 2010, Pages 2519–2527
نویسندگان
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