Abadie, Alberto; Imbens, Guido W. - In: Journal of Business & Economic Statistics 29 (2011) 1, pp. 1-11
In Abadie and Imbens (2006), it was shown that simple nearest-neighbor matching estimators include a conditional bias term that converges to zero at a rate that may be slower than <italic>N</italic> -super-1/2. As a result, matching estimators are not <italic>N</italic> -super-1/2-consistent in general. In this article, we...