“…According to previous literature (Gu, Liu, et al, 2019; Gu, Shen, et al, 2019; Liu & Shen, 2014a, 2017; Niedomysl & Hansen, 2010; Pu et al, 2019; Shen, 2012), we model the migration of skilled and less‐skilled internal migrations in 2010–2015 using 21 variables of origins and destinations, including three gravity variables (population size at the origin, population size at the destination, and the distance between the origin and destination), and variables of economic opportunities, natural comforts, public services, environmental quality, service amenities, and several control variables. A region's economic opportunities can be represented by its average wage level, employment stability, and industrial structure (Gu, Meng, et al, 2019; Shen, 2012, 2015).…”