This paper deals with identification of discrete games of incomplete information when we allow for three types of unobservables: payoff-relevant variables, both players' private information and common knowledge, and nonpayoff-relevant variables that determine the selection between multiple...

Models of unobserved heterogeneity, or frailty as it is commonly known in survival analysis, can often be formulated as semiparametric mixture models and estimated by maximum likelihood as proposed by Robbins (1950) and elaborated by Kiefer and Wolfowitz (1956). Recent developments in convex...

Statistical models of unobserved heterogeneity are typically formalized as mixtures of simple parametric models and interest naturally focuses on testing for homogeneity versus general mixture alternatives. Many tests of this type can be interpreted as C(») tests, as in Neyman (1959), and shown...

Single index linear models for binary response with random coefficients have been extensively employed in many econometric settings under various parametric specifications of the distribution of the random coefficients. Nonparametric maximum likelihood estimation (NPMLE) as proposed by Cosslett...

Empirical Bayes methods for Gaussian compound decision problems involving longitudinal data are considered. The new convex optimization formulation of the nonparametric (Kiefer-Wolfowitz) maximum likelihood estimator for mixture models is employed to construct nonparametric Bayes rules for...

Statistical models of unobserved heterogeneity are typically formalized as mix- tures of simple parametric models and interest naturally focuses on testing for homogeneity versus general mixture alternatives. Many tests of this type can be interpreted as C(») tests, as in Neyman (1959), and...

Efron's elegant approach to g-modeling for empirical Bayes problems is contrasted with an implementation of the Kiefer-Wolfowitz nonparametric maximum likelihood estimator for mixture models for several examples. The latter approach has the advantage that it is free of tuning parameters and...

As of November 2021, all former Communist countries from Central and Eastern Europe exhibit lower vaccination rates than Western European countries. Can institutional inheritance explain, at least in part, this heterogeneity in vaccination decisions across Europe? To study this question we...

We provide a comprehensive picture of the health effects of social isolation using longitudinal data over 21 European countries (SHARE). First, using Cox regressions, we find a significant, strong and robust association between our social isolation index and mortality, which is much stronger in...

As of November 2021, all former Communist countries from Central and Eastern Europe exhibit lower vaccination rates than Western European countries. Can institutional inheritance explain, at least in part, this heterogeneity in vaccination decisions across Europe? To study this question we...