According to Princeton University researchers Stacie Carr and Marta Tienda, the average number of family members brought to the U.S. by newly naturalized Mexican immigrants stands at roughly six.
Therefore, should all 1.5 million amnestied illegal aliens bring six relatives each to the U.S., that would constitute a total chain migration of nine million new foreign nationals entering the U.S.
If the number of amnestied illegal aliens who gain a pathway to citizenship under an immigration deal were to rise to the full 3.3 million who would be eligible for DREAM Act amnesty, and if each brought in three to six foreign family members, the chain migration flow could range from 9.9 million to 19.8 million foreign nationals coming to the U.S.