REMOVED: The valuation of social impact bonds: An introductory perspective with the Peterborough SIB

Unfortunately, the published paper is not the definitive version of the work: some information and references are missing. The text, in its current form, cannot be amended by a corrigendum. From this perspective, it has been decided to retract the paper and resubmit the correct version of this article. The author apologises for any inconvenience related to this retraction