Sustainability is currently a common term used more and more frequently in the academic literature and in the public communications of companies. This is an indicative that suggests that more and more sustainability is understood as a challenge that involves not only environmental aspects, but also as an integrative concept including economic, environmental and social aspects that should be a key pillar of the most highly innovative and advanced companies in the twenty first century. This study has been developed over several years, collecting detailed information on more than two hundreds different ESCO projects (Energy Service Company) in Spain, developed during five years (2010 to 2014). The aim of this research is related to obtaining a better understanding of an issue that is a concern: to what extend these projects that are seeking the efficient reduction of energy from collaboration between companies, could contribute to the integrated vision of sustainability, as a platform for the integration of economic and environmental.
corporate social responsibility; operational inefficiency; dynamic technical inefficiency; data envelopment analysis