This paper considers the problem of estimating treatment effects when there is a large number of potential control units. The paper introduces to the economics literature the idea of polytope volume minimization as a method of estimating a factor model when observed outcomes are assumed to be a...

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...

It is not possible to directly observe the distribution of individual treatment effects. However, this paper presents new results showing that the distribution may be inferred with data usually available from randomized control trials. Developing upon recent results presented in the computer...