Mobile Phone Call Data as a Regional Socio-Economic Proxy Indicator Šćepanović S, Mishkovski I, Hui P, Nurminen JK, Ylä-Jääski A (2015) PLoS ONE 10(4): e0124160. doi: 10.1371/journal.pone.0124160有名なコートジボワールのOrange，D4Dの提供す…