Network of families in a contemporary population: regional and cultural assortativityKunal Bhattacharya, Venla Berg, Asim Ghosh, Daniel Monsivais, János Kertész, Kimmo Kaski and Anna RotkirchEPJ Data Sci., 7 1 (2018) 9DOI: https://doi.org/10.1140/epjds/s13688-018-0137-9