by means of the two-stage data envelopment analysis (DEA) procedure proposed by Simar
and Wilson (J Econ, 136: 31–64, 2007). In the first stage, the technical efficiency of football
clubs is estimated using a bootstrapped DEA model in order to establish which of them are
the most efficient; the ranking is based on total productivity in the period 1996–2004. In the
second stage, the Simar and Wilson (J Econ, 136: 31–64, 2007) procedure is used to …