Simar, Leopold and Zelenyuk, Valentin (2004): On testing equality of distributions of technical efficiency scores. Published in: Econometric Reviews , Vol. 25, No. 4 (December 2006): pp. 497-522.
Zelenyuk, Valentin (2005): Power of significance test of dummies in Simar-Wilson two-stage efficiency analysis model. Published in: Applied Economics Letters , Vol. 15, No. 16 (2009): pp. 1493-1495.
