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ENTROPIC LATENT VARIABLE INTEGRATION VIA SIMULATION
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DOI：10.3982/ECTA9748.png)
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Abstract
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This paper introduces a general method to convert a model defined by moment conditions that involve both observed and unobserved variables into equivalent moment conditions that involve only observable variables. This task can be accomplished without introducing infinite-dimensional nuisance parameters using a least favorable entropy-maximizing distribution. We demonstrate, through examples and simulations, that this approach covers a wide class of latent variables models, including some game-theoretic models and models with limited dependent variables, interval-valued data, errors-in-variables, or combinations thereof. Both point- and set-identified models are transparently covered. In the latter case, the method also complements the recent literature on generic set-inference methods by providing the moment conditions needed to construct a generalized method of moments-type objective function for a wide class of models. Extensions of the method that cover conditional moments, independence restrictions, and some state-space models are also given.
Keywords:
Method of moments
latent variables
unobservables
partial identification
entropy
simulations
least favorable family
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