The Immigration Policy Center has released a report called "Economic Progress via Legalization: Lessons from the Last Legalization Program" [1] which points out that the 1986 amnesty helped those amnestied improve their situations. However, there's little in their report that's remarkable and they don't take into account the balance between the benefits and costs of the amnesty; everything's...
... author of the study is demographer Rob Paral, and Siciliano is "executive director of the Program in Law, Economics and Business at Stanford Law School and a research fellow for the Washington, D.C.-based center."