Non-discretionary or environmental variables are regarded as important in the evaluation of efficiency in Data Envelopment Analysis (DEA), but there is no consensus on the correct treatment of these ...

Krishna B. Athreya, On the Absolute Continuity of the Limit Random Variable in the Supercritical Galton-Watson Branching Process, Proceedings of the American Mathematical Society, Vol. 30, No. 3 (Nov.