The World Sanitation Financing Facility (WSFF) started life as a timely idea. Born out of a conversation between Arthur Wood, then global head of Ashoka’s social financial services, Jack Sim, founder of the World Toilet Association and World Toilet Day, and Dr Guy Hutton, the leading Sanitation Economist for the World Bank’s Water and Sanitation Program (WSP), it came into being just as the wave of interest in social benefit investing was gaining momentum.

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