空气质量对中国人口迁移的影响

曹广忠, 刘嘉杰, 刘涛

Examining the role of air quality in shaping the landscape of China′s internal migration: Phase characteristics, push and pull effects

CAO Guangzhong, LIU Jiajie, LIU Tao

表2 变量描述性统计

Tab. 2 Descriptive statistics of variables

变量 观测数 均值 标准差 最小值 最大值 netmig 1148 -3.10 14.49 -45.60 82.56 immig 1148 8.01 10.90 0.06 83.57 emig 1148 11.16 7.41 0.04 47.44 PM 1148 33.83 16.65 5.03 79.14 PGDP 1140 9.79 0.95 7.06 12.24 empⅡ 1109 25.53 11.80 1.12 76.02 empⅢ 1109 31.64 9.87 5.17 81.11 library 1135 45.56 68.90 2.00 924.57 school 1139 6.75 1.83 0.08 19.67 hospital 1141 17.87 7.97 4.83 115.15 pop 1148 5.84 0.69 2.77 8.01 admin 1148 0.10 0.30 0 1 east 1148 0.35 0.48 0 1 mid 1148 0.35 0.48 0 1 agg 1148 0.33 0.47 0 1