A persistent paradox in stochastic frontier efficiency research is that we cannot compare the X-efficiency of firms without assuming these firms to operate under a common frontier. In this paper, we address this imbalance by constructing so-called metafrontiers. Specifically, we build on recent...

This paper provides an explanation of technical inefficiencies of financial exchanges in Europe as well as an empirical analysis of their existence and extent. A single-stage stochastic cost frontier approach is employed, which generates exchange inefficiency scores based on a unique unbalanced...