The method uses a computer device to receive as inputs socio-economic data of a region during a definite time period representing an economic time series that are stored in a first database, comprising: computing, during the same definite time period, the average values of each of a plurality of anonym and aggregated call records generated by individuals using a plurality of base stations of said region obtaining calling variables and computing from said calling variables calling variables' time series representing average temporal usage statistics that are stored in a second database; and building from said economic time series and said computed calling variables time series a model to forecast future values of the economic time series of said region.
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