http://www.migrationinformation.org/Feature/display.cfm?id=331
Joaquín Arango and Maia Jachimowicz
"Extraordinary regularization programs granting legal status to unauthorized immigrants have recently come to the forefront of attention. Although it is increasingly debated whether such amnesties are a valuable immigration policy tool, many governments continue to use them in an effort to control and reduce irregular immigration, with varying degrees of success. "
