“…This requires the construction of a hypothetical and virtual production function linking the tourist resources these territories possess to the outcomes achieved (Assaf & Josiassen, 2012;Soysal-Kurt, 2017). From the methodological standpoint, in order to gauge the performance of this input-output relation, the use of nonparametric methods, principally data envelopment analysis (DEA), is particularly common, given its ability to adapt to multioutput models, to name but one of its advantages (Cracolici, Nijkamp, & Rietveld, 2008;Figueroa, Herrero, Báez, & Gómez, 2017;Hadad, Hadad, Malul, & Rosenboim, 2012). In recent years, however, conditioned efficiency applications have come to the fore, where the use of DEA is complemented with a second-stage analysis, taking into account other external variables that might impact on performance (Bi, Lou, & Liang, 2011;Figueroa et al, 2017;Hadad et al, 2012).…”