Qualitative mismatches arise when the qualifications or skills of workers, individually or in the aggregate, are different from the qualifications or skills required or specified for their jobs. This review provides an introduction to the subject as well as a survey for social scientists...

This paper applies queueing theory to derive the equilibrium of a labor market with frictions. Queueing arises when workers can get jobs by waiting at a firm for a position to open. Queueing theory provides expressions for the expected numbers of vacancies, searching workers and queueing...