“…On accounts of the empirical studies on the primary causes of urbanization, we selected 11 potential factors namely GDP per capita (PGDP), the proportion of the second industry to GDP (PSI), the proportion of the tertiary industry to GDP (PTI), government revenue per area (PGV), fixed asset investment per area (PFAI), disposable personal income for urban residents (DPI), budget per area (PD), foreign trade export per area (PFT), foreign investment per area (PFI), retail sales of consumer goods (PTSC)and road junctions per area (PRJ) (Deng, Huang, Rozelle, Uchida, 2010;Liu, Yin, Ma, 2012;Seto et al, 2012). Because the explanatory variables are in the ratio form, we transformed these factors into the "per capita" or "per area" form correspondingly.…”