When it comes to impact investing, however, good data remains less available, and what we do have can be uneven in quality and comparability. Yet in my view, more quality data to support rigorous impact measurement and management is exactly what is needed to mobilize private impact investment at scale to address the massive social and environmental challenges that we face and achieve the UN-supported Sustainable Development Goals (SDGs) by 2030. Last year, the United Nations Association - UK produced a report entitled "Sustainable Development Goals 2016: The people’s agenda" addressing the SDGs. In it, contributors Mahmoud Mohieldin and Claire Melamed observe that the quality of SDG-related data varies considerably between countries, constraining our ability to identify and address the most pressing global gaps. For instance, they found no available data on measurable poverty trends in 29 developing countries between 2002 and 2011, and only a single data point for an additional 28 emerging countries.