This paper considers estimation of the treatment effect where the researcher has data from a large number of related experiments. The paper considers two cases. In the first, there are a large number of treated units. The paper shows that standard analogue estimate of higher moments of the...

The paper presents sharp bounds on the identified set for classical factor models and non-parametric topic models based on results from the non-negative factorization literature. It compares the standard assumption (for factor models) of orthonormality of the factors (principal components...

The paper presents conditions for non-parametric identification of a joint distribution when the marginal distributions are identified and the joint distribution is only identified for a subset of the domain. This result is applied to sealed bid auctions where bidders face competing auctions for...