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Table 1 Descriptive statistics for key individual, region, and industry variables

From: Regional segregation or industrial monopoly? Dual labor market segmentation and income inequality in China

Variable Mean/proportion Standard deviation Sample
Individual level
 Individual monthly income (yuan) 1306.124 3207.396 14,698
 Male 54.5% 14,698
 Urban residents 43.1% 14,698
 Number of years of schooling 6.957 4.981 14,698
 Work experience (years) 28.632 13.906 14,698
 Party membership 8.2% 14,698
 Occupation’s ISEI 32.884 14.562 14,698
 Work at state/collective sector 17.5% 14,698
Region level
 County GDP per capita (10,000 yuan) 4.428 5.360 162
 County average of years of schooling 9.139 1.477 162
Industry level
 Industry type    
  Agriculture 5.3% 19
  Industry and manufacturing 21.1% 19
  Service and other 73.7% 19
 Industry age (proportion of entities established after 2000) .643 .198 19
 Industry scale (the log of the number of employees) 15.796 1.081 19
 Proportion of female employees .368 .122 19
  Proportion of employees with higher education .389 .214 19
  Proportion of entities owned by statea .082 .107 18
  Average revenue per capita (10,000 yuan)a 40.256 35.794 18
  1. aFor the industry of “public administration and social organizations,” the relevant statistics are not available. In the following analysis, we replaced the missing values with the sample mean and added a dummy variable indicating this missingness