(a) Estimate how much more or less workers on average earn when they work for government as opposed to private sector, holding their characteristics constant. Interpret the findings.
(b) Assess whether government is a more 'meritocratic' employer. Do this by expanding the model in a) to test whether ability (asvabc) and years of schooling (s) have larger effect on earnings in government than in the private sector. Interpret the findings.