1. Laia Mojica is Scholarship holder of Geography and Sociology, University of Lleida.
2. Jordi Martí-Henneberg is Professor of Human Geography, University of Lleida. He is the author of, with Ian Gregory, “The Railways, Urbanisation and Local Demography in England & Wales, 1825–1911,” Social Science History, XXXIV (2010), 199–228; with Gregory and Francisco J. Tapiador, “A GIS Reconstruction of the Population of Europe, 1870 to 2000,” Journal of the Royal Statistical Society A, CLXXIII (2009), 31–50.