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...

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...