What digital technology says about the complexity of the city

Omnipresent in the city, data feeds the dream of a greener city, better shared and freed from all forms of congestion. Yet, while cities are beginning to capture this data, it still has intrisic limitations: data measures past actions. Taking into account this bias, how can we predict effectively, based on past information, how the city will be transformed? What do the new digital tools tell us about the complexity of the city in areas such as housing and mobility?