“…Studies have focused on physical and cultural traits, such as age (Choo, 2015;Choo and Siow, 2006); education (Jones, 2010); height, intelligence and religion (Kalmijn et al, 2005); race and ethnicity (Bratter andKing, 2008, Feng et al, 2012;Frimmel et al, 2012); income and body mass index (Chiappori et al, 2012). Inter-ethnic marriages have been considered in the migration literature, in order to understand the process of assimilation (Algan et al, 2012;Constant and Zimmermann, 2008;Constant et al, 2009;Meng and Gregory, 2005).…”