This report is the result of over 18 months of consultative work led by the SDSN with the contributions of nearly500 organizations and thousands of individuals – draft versions of the report have so far been downloaded over80,000 times. The SDSN Thematic Groups, a large number of UN agencies and other international institutions, national statistical offices, civil society organizations, academia, and businesses have provided expert input that has helped us improve the indicator framework. We are particularly grateful for the detailed comments received during two public consultations, the first from February to March 2014, and the second in January 2015.