This open access book explores the conceptual challenges posed by the presence of migrants with irregular immigration status in Europe and the evolving policy responses at European, national and municipal level. It addresses the conceptual and policy issues raised, post-entry, by this particular...

This paper investigates the effect of U.S. border enforcement on the net flow of Mexican undocumented migration. It shows how this effect is theoretically ambiguous, given that increases in border controls deter prospective migrants from crossing the border illegally, but lengthen the duration...

Border enforcement of immigration laws raises the costs of illegal immigration, while interior enforcement also lowers its benefits. Used together, border and interior enforcement therefore reduce the net benefits of illegal immigration and should lower the probability that an individual will...

We provide the first evidence on the causal effect of border enforcement on the full spatial distribution of Mexican immigrants to the United States. We address the endogeneity of border enforcement with an instrumental variables strategy based on administrative delays in budgetary allocations...

Over the past decade, a number of federal and state policies intended to stem the flow of illegal immigration have been implemented. In this paper, we focus on two initiatives: (a) Operation Streamline, as an example of increased border enforcement by the federal government, and (b) state-level...

Canonical models of migration feature border enforcement as a strategy to contain undocumented immigration by effectively exacting a mobility cost. This paper revisits the role of border enforcement policy in a task-based model of the labor market where employers simultaneously hire circular...