Skill bias and employment frictions in the US labor market 1970-1990

This article studies simultaneous changes in four labor market variables: the unemployment rates for college and high-school graduates, the education wage premium, and the level of college participation. It develops an equilibrium search and matching model of the labor market where education is endogenously determined. Then the model is used to investigate quantitatively whether the change in the above labor market variables from 1970 to 1990 in the United States can be traced to changes in the environment. A skill-biased change in technology together with an increase in employment frictions can explain much of the observed variation in these variables.