- Volume 25, Number 2 (2019), 848-876.
Smooth, identifiable supermodels of discrete DAG models with latent variables
We provide a parameterization of the discrete nested Markov model, which is a supermodel that approximates DAG models (Bayesian network models) with latent variables. Such models are widely used in causal inference and machine learning. We explicitly evaluate their dimension, show that they are curved exponential families of distributions, and fit them to data. The parameterization avoids the irregularities and unidentifiability of latent variable models. The parameters used are all fully identifiable and causally-interpretable quantities.
Bernoulli, Volume 25, Number 2 (2019), 848-876.
Received: December 2015
Revised: January 2017
First available in Project Euclid: 6 March 2019
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Evans, Robin J.; Richardson, Thomas S. Smooth, identifiable supermodels of discrete DAG models with latent variables. Bernoulli 25 (2019), no. 2, 848--876. doi:10.3150/17-BEJ1005. https://projecteuclid.org/euclid.bj/1551862837