controlled for the observed characteristics and sample selection, for men, covered sector wages are at least twice as higher than … uncovered sector wages at all levels of experience and education. This is true with some caveat for women also. This large … differential in wages can be taken as an indication of labor market segmentation between the covered and uncovered wage earners …

finding is that when controlled for observed characteristics and sample selection, for men, the wages of the vocational high … private rates of return to schooling, unemployment rates and wages favor vocational high schools than general high schools …

earn more than the uncovered wage earners and the self-employed. For the covered wage earners, men's expected wages are … about twice higher than the women's wages. For the uncovered wage earners, men's wages are near parity with those of women …