Measuring ecoefficiency of municipal solid waste management in Apulia to account for governance heterogeneities

This paper adopts a meta-frontier non-parametric directional distance function framework to measure the ecoefficiency of municipal solid waste (MSW) services in 258 municipalities in the Apulia region from 2012 to 2016. Model specification includes the operating cost per quantity of waste as input and the per capita quantities of sorted and unsorted waste as the desirable and undesirable outputs. The heterogeneities due to the different governance systems implemented in the six areas in which the regional territory was partitioned to manage the MSW service were considered. A dynamic distributional analysis of MSW ecoefficiencies was performed, and determinants affecting their measure were investigated. The results show that the average MSW service meta-frontier ecoefficiency decreased from 0.631 to 0.546, while the technology gap ratio value diminished from 0.899 to 0.827. Findings relative to the impact on ecoefficiency of variables measuring either the size or density of MSW services remain inconclusive.