Sensing labour mobility flows of cross-border urban regions using machine learning and geolocated social network dataManuel Mendoza-Hurtado, Olle Järv, Milad Malekzadeh, Oleksandr Karasov and Domingo Ortiz-BoyerEPJ Data Sci., 15 1 (2026) 55DOI: https://doi.org/10.1140/epjds/s13688-026-00662-1