Variables | Definition | Observation | Mean | Std | Minimum | Maximum |
1) Annual county data | ||||||
nightlight | Night light brightness (range 0 - 63) | 14,131 | 5.450 | 7.910 | 0.028 | 62.165 |
d_light | Annual growth of light intensity (%) | 14,131 | 33.677 | 145.442 | −1100.975 | 1904.348 |
pceducate | Number of primary and secondary school students per 10,000 people | 13,581 | 785.163 | 747.191 | 0.030 | 3642.145 |
palabor | Population per unit of land area (10,000 people/square kilometers) | 13,652 | 170.172 | 258.965 | 0.000 | 1952.392 |
pdinvest | Investment in fixed assets per unit of GDP | 8377 | 0.464 | 0.296 | 0.007 | 7.127 |
pcgengdi | Per capita arable land area (ha./10,000 people) | 7925 | 234.614 | 468.871 | 0.000 | 7428.728 |
pcgdp | Per capita GDP (10,000 yuan) | 9079 | 0.653 | 1.362 | 0.000 | 29.527 |
2) County time-point data | ||||||
diversity | Clan surname diversity index | 1087 | 0.607 | 0.353 | 0 | 0.983 |
surname_count | Number of clan surnames | 1087 | 10.850 | 16.013 | 1 | 110 |