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Table 5 Interaction model between occupational interaction and unit nature N = 2536

From: Occupational interactions and income level: a social capital study using the first-order difference method

Variable Least squares method model First-order difference model
M1 M2 M3
Explanatory variable Monthly income of first job Monthly income of present job Monthly income difference
Internal interaction −.0005 −.018 −.003
(.007) (.015) (.009)
Outward interaction .024* .047** .028**
(.009) (.013) (.008)
State-owned unit −.393* −.119 −.270*
(.122) (.103) (.127)
Internal interaction × state-owned sector −.001 .013 .026
(.013) (.014) (.019)
Internal interaction × state-owned sector −.008 −.032** −.023*
(.011) (.008) (.010)
Seeking job by pulling strings .099** .008 .037
(.015) (.049) (.035)
Male −.078** −.115**
(.013) (.024)
Age .026 .001 .029**
(.011) (.011) (.007)
Square of age/100 .021 −.132 −.029*
(.027) (.015) (.010)
Education level .044*** .057*** .080***
(.004) (.009) (.009)
Party member .089 .136* .273**
(.059) (.065) (.062)
Frequency of changing jobs .007 −.011
(.006) (.013)
Unit size/100 −.001 .036** .001
(.001) (.007) (.001)
Administrative staff .083 .187** .175***
(.030) (.021) (.026)
Category of employment (10 categories) Yes Yes Yes
Intercept .062 .730 .907**
(.137) (.252) (.229)
R square .398 .233 .110
Sample size 2536 2536 2536
  1. Note: (1) *p < 0.05, **p < 0.01, ***p < 0.001. (2) Values inside the parentheses are standard errors obtained by taking heteroskedasticity robustness and urban cluster robustness into account. (3) “Yes” means that this variable is controlled for in the model. (4) In a difference model, an explanatory variable corresponds to the change value; for specifics, please refer to notes below Tables 3 and 4