“…Agglomeration can endow a city with a high ability to create jobs because of its positive effects on productivity (Ciccone & Hall, 1996;Combes et al, 2012;Combes & Gobillon, 2015;Li et al, 2012;Lucas, 2004;Rosenthal & Strange, 2004;Zhang et al, 2017). For example, rural migrants can benefit from urban agglomeration economies through formal or informal social interactions such as meetings, peer effects, imitation, and social networking (Yang et al, 2017). Agglomeration also leads to some diseconomies, such as higher living costs, congestion, pollution, crime, and poverty (Glaeser, 1998), suggesting that agglomeration may decrease the attractiveness of a city to agricultural laborers and decelerate urban employment growth.…”