“…Urban scaling laws suggest that city population is sublinearly correlated with infrastructure growth, indicating scale economies in city infrastructure systems (Bettencourt, Lobo, Helbing, Kuhnert, & West, 2007;Ramaswami, Jiang, Tong, & Zhao, 2018). Studies indicate that population growth rates positively influence capital spending on infrastructure in the United States (Fisher & Wassmer, 2015;W. Wang & Wu, 2017), whereas the percentage of senior population has a negative impact on the investment level (Fisher & Wassmer, 2015).…”