Using the net effect of all relevant regressors omitted from a model to form its error term is incorrect because the coefficients and error term of such a model are non-unique. Non-unique coefficients cannot possess consistent estimators. Uniqueness can be achieved if; instead; one uses certain...

This paper establishes nonparametric identification of individual treatment effects in a nonseparable model with a binary endogenous regressor. The outcome variable may be continuous, discrete, or a mixture of both, while the instrumental variable can take binary values. First, we study the case...

This paper examines the relationship between Supplemental Nutrition Assistance Program (SNAP) participation and food insecurity using data from the 2001-2008 Current Population Survey Food Security Supplement (CPS-FSS). A behavioral Rasch selection model is proposed and estimated using four...

In the absence of a broad-based pension scheme, the elderly in developing countries may rely on monetary transfers made by their children and on their own labour supply. This paper examines whether monetary transfers from children help to reduce elderly parents' need to work. Taking the possible...

In the absence of a broad-based pension scheme, the elderly in developing countries may rely on monetary transfers made by their children and on their own labour supply. This paper examines whether monetary transfers from children help to reduce elderly parents’ need to work. Taking the...

Consider a nonseparable model Y=R(X,U) where Y and X are observed, while U is unobserved and conditionally independent of X. This paper provides the first nonparametric test of whether R takes the form of a transformation model, meaning that Y is monotonic in the sum of a function of X plus a...

In the absence of a broad-based pension scheme, the elderly in developing countries may rely on monetary transfers made by their children and on their own labour supply. This paper examines whether monetary transfers from children help to reduce elderly parents' need to work. Taking the possible...