Dynamics of immigration control

This paper examines the dynamic implications of border control policies and internal enforcement measures for the pattern of illegal immigration and the sectoral allocation of clandestine foreign workers. It is argued that efforts to control illegal immigration in sectors where they traditionally find employment may trigger the formation of networks supporting clandestine foreign workers in new locations and occupations where the probability of detection is relatively lower. The end result may be an increase in the overall stock of illegal immigrants residing in the economy.