In this study, we only included seven variables for several
reasons that we discussed above. The inclusion of more potential
driving factors in a future study would be worthwhile. In addition,
while we investigated the temporal dynamics of the effects of
driving factors on urban expansion, we did not examine the spatial
heterogeneity of the driving factors. Empirical studies have shown
that the effects of the driving factors on urban expansion may vary
spatially (Luo & Wei, 2009; Müller et al., 2010). Therefore, future
work on the spatial heterogeneity of the effects of the driving
factors on urban expansion is recommended.