“…The impact of migration to the ethnic structure of population is often examined at the national or international levels (e.g., Mitchell, Kicošev 1997, Plavša, Bubalo-Živković, 2002, Djurdjev, et al, 2009. At the intra-regional level, changes in ethnic structure of population have rather been investigated in relation to natural reproduction of population, due to (as emphasized by Gabal 1999) specific cultural, social and also reproductive behaviour of each ethnic group, or in different kinds of processes of assimilation (e.g., Majo 2009).…”