Christmas is a time of seasonal cheer, family get-togethers, holiday parties, and-gift giving. Lots and lots--and lots--of gift giving. It's hard to imagine any Christmas without this time-honored custom. But let's stop to consider the gifts we receive--the rooster sweater from Grandma or the...

Economists have long counseled reliance on markets rather than on government to decide a wide range of questions, in part because allocation through voting can give rise to a "tyranny of the majority." Markets, by contrast, are believed to make products available to suit any individual,...

We present new results on the identifiability of a class of nonseparable nonparametric simultaneous equations models introduced by Matzkin (2008). These models combine exclusion restrictions with a requirement that each structural error enter through a "residual index". Our identification...

Empirical models of demand for - and, often, supply of - differentiated products are widely used in practice, typically employing parametric functional forms and distributions of consumer heterogeneity. We re view some recent work studying identification in a broad class of such models. This...

We present a new class of methods for identification and inference in dynamic models with serially correlated unobservables, which typically imply that state variables are econometrically endogenous. In the context of Industrial Organization, these state variables often reflect econometrically...