Since 1999, the ACM Special Interest Group on Economics and Computation (SIGecom) has sponsored the leading scientific conference on advances in theory, empirics, and applications at the interface of economics and computation. The 21st ACM Conference featured invited speakers, posters, workshops, and tutorials. This year, Data Science Nigeria presented its award-winning poster, "Shared trust to End Poverty and Promote Financial Inclusion", alongside leading institutions like Stanford University, Harvard University, University of Oxford, Imperial College London and many institutions in Africa. The poster explores how real-time crowdsourcing of financial fraud data can proactively prevent fraud based on the established theories of social trust path design, network-enabled social regularization and truthful mechanisms. Data Science Nigeria has established itself as a world-class Artificial Intelligence community with proven track record in the application of cutting-edge solution-oriented Artificial Intelligence, outstanding research excellence, development of business use cases, consulting services delivery, capacity building and AI for good solutions.