“…With the development of knowledge in network (Ke et al, 2006a(Ke et al, , 2006b, we are capable of connecting aggregation process with social sciences (Bellaiche, 2010;Gonzalez-Avella et al, 2011). One important and popular application of aggregation process in social science is population dynamics (Brito and Dilao, 2010;Eckstein et al, 2011;Feng et al, 2010;Gupta and Dutta, 2011;Konan, 2011;Wang et al, 2007;Ziesemer, 2010). Population dynamics involves issues like population migration (Brito and Dilao, 2010;Feng et al, 2010;Konan, 2011), population growth (Wang et al, 2007) and job mobility (Eckstein et al, 2011;Gupta and Dutta, 2011;Ziesemer, 2010).…”