One thing we know about “big data” in developing countries is that the only data stream that covers the poor is that which is generated by the mobile operators. Here is an account of an interesting application of mobile big data: There’s a vast market of consumers in countries like Brazil, China, India, and the Phillipines who want access to financial services like credit cards, loans, or insurance,” says Jonathan Hakim, Cignifi’s chief executive. “But while they may have jobs, and some have bank accounts, there really is no credit history for them.” One thing they do have? Mobile phones.