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Table 3 Selection Model: 2nd stage

From: Global health worker salary estimates: an econometric analysis of global earnings data

  (OLS)
Log (wages)
(OLS, t)
Log (wages)
(GLM)
Monthly wages
(USD 2010)
(GLM, t)
Monthly wages
(USD 2010)
Log GDP per capita 0.630***
CI (0.5218216, 0.6826666)
0.701***
CI (0.4905892, 0.7463968)
0.474***
CI (0.366835, 0.6134864)
0.773***
CI (0.5477371, 0.9689427)
Skill level 1 0
(.)
0
(.)
0
(.)
0
(.)
Skill level 2 0.514*
CI (0.2477793, 0.7426511)
0.537*
CI (0.2483299, 0.7399533)
0.462*
CI (0.98367, 0.823418)
0.462*
CI (0.0457699, 0.6770993)
Skill level 3 0.769**
CI (0.5098665, 0.991286)
0.786**
CI (0.5129751, 0.9960829)
0.654***
CI (0.3342827, 0.9630529)
0.659***
CI (0.3371977, 0.8379690)
Skill level 4 1.239***
CI (0.959575, 1.480105)
1.261***
CI (0.9675765, 1.48336)
1.364***
CI (0.8282947, 1.900386)
1.364***
CI (0.7097371, 1.404407)
Mills ratio 0.877*
CI (− 0.0750366, 0.6274496)
0.379
CI (0.2409532, − 0.9886227
0.596*
CI (0.537331, 1.181299)
0.640*
CI (0.3342776, 0.908729)
Developed 0.565**
CI (0.5011368, 0.9780193)
0.560**
CI (0.5030425, 0.9732712)
0.842***
CI (0.4943383, 1.075699)
0.841***
CI (0.3900876, 0.9895371)
Year   − 0.143*
CI (0.0988324, 0.5013373)
  0.0126
CI (0.0077645, 0.0344916)
Constant 1.036*
CI (0.9810699, 2.206689)
25.00835 *
CI (− 59.54842, 109.5651)
2.467***
CI (1.65083, 3.049449)
− 22.85
CI − 57.94873, 44.432837)
Observations 320 320 316 316
  1. Confidence intervals (CI) in parentheses
  2. * p < 0.05, ** p < 0.01, *** p < 0.001