1. Institute for Biocomputation and Physics of Complex Systems (BIFI) and Center for Time Use Research (CTUR), University of Zaragoza, Zaragoza, Spain
2. Institute for Biocomputation and Physics of Complex Systems (BIFI) and Institute of Labor Economics (IZA), University of Zaragoza, Zaragoza, Spain
3. University of Zaragoza, Zaragoza, Spain