The concept of the dual labor market was developed in the USA in the 1960s in order to be able to explain the disadvantage among others of black minorities in the urban labor markets.
Conceptually, the labor market tends to split into two segments. The jobs in the primary sector are characterized by higher wages, better opportunities for advancement, greater job security and higher professional qualifications of the employees. In contrast, incomes in the secondary sector are low, working conditions are poor, vocational qualifications are low, job security is scarce and opportunities for employees to move up to the primary sector are the exception.
This is the result of an increasingly dual economic structure, which is breaking up into a core area of monopolistic - oligopolistic structure and an unstable peripheral competitive sector. Critics think that a structural parallelism of product and labor markets is assumed here, which in reality is not given.