Table 4.

Human capital and productivity in wage and self-employed sector

	ln hourly earnings from wage work	ln hourly earnings from self-employment	Self-employment premium rel to wages
	(1)	(2)	(3)
Height (logarithm)	1.658 (0.284)	1.952 (0.364)	0.331 (0.539)
Cognitive assessments (z scores)
Raven's progressive matrices	0.059 (0.015)	0.070 (0.020)	−0.002 (0.030)
Fluid intelligence assessment	0.004 (0.016)	0.063 (0.021)	0.105 (0.030)
Working memory: Immediate	0.035 (0.020)	0.024 (0.024)	0.077 (0.036)
Working memory: Delayed	0.011 (0.019)	0.021 (0.022)	−0.030 (0.034)
Completed education (years)	0.067 (0.003)	0.057 (0.004)	0.009 (0.006)
Health indicators
BMI (logarithm)	0.825 (0.104)	1.026 (0.123)	0.344 (0.200)
(1) if difficulty running 1km	−0.031 (0.025)	−0.001 (0.028)	0.030 (0.035)
Systolic blood pressure	0.024 (0.009)	0.007 (0.011)	−0.005 (0.014)
Pulse pressure	−0.041 (0.010)	−0.044 (0.014)	0.004 (0.017)
(1) if self-employment earnings			−2.893 (2.870)
Local market fixed effects	Y	Y	.
Individual fixed effects	.	.	Y
Joint tests (F-statistics)
All human capital markers	104.9	56.91	4.40
Cognitive assessments	9.917	12.05	5.46
Health indicators	21.67	20.85	0.95
Sample size	21,119	26,252	17,856

Note: Standard errors in parentheses and all test statistics based on estimates clustered at the individual level and robust to arbitrary forms of heteroskedasticity. All models include flexible age controls and survey wave fixed