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. 2020 Jun 16;6(6):e04127. doi: 10.1016/j.heliyon.2020.e04127

Table 4.

Salary regression results.

Variables Men
Women
Pooled OLS Pooled OLS Heckman
Friends 0.0176∗ 0.0180∗ 0.0179∗
Age 0.0332∗ 0.0296∗ 0.0284∗
Age Squared -0.0004∗ -0.0003∗ -0.0003∗
Years in Education 0.0424∗ 0.0391∗ 0.0388∗
Married 0.0991∗ 0.0460∗ 0.0494∗
Tenure 0.0089∗ 0.0137∗ 0.0138∗

Type of work
 Part-time 0.4271∗ 0.3788∗ 0.3789∗

Size of Company
 Medium 0.1176∗ 0.1047∗ 0.1048∗
 Large 0.1731∗ 0.1660∗ 0.1661∗
Constant 3.4797∗ 3.3875∗ 3.4178∗
Mills inverse ratio -0.0111∗
R2 44.32% 52.12%
Number of Observations 985,470 623,494 623,494
Instrumental Variable:
 Number of people that work in a particular household 4.3394∗
Number of Observations 2,075,104

∗p < 0.05.

Note: All regressions were controlled by occupation, industry, city, and year.