Israel admits it revoked residency rights of a quarter million Palestinians
http://www.haaretz.com/news/diplomacy-defense/israel-admits-it-revoked-residency-rights-of-a-quarter-million-palestinians
Israel stripped more than 100,000 residents of Gaza and some 140,000 residents of the West Bank of their residency rights during the 27 years between its conquest of the territories in 1967 and the establishment of the Palestinian Authority in 1994.
As a result, close to 250,000 Palestinians who left the territories were barred from ever returning.
Given that Gaza’s population has a natural growth rate of 3.3 percent a year, its population today would be more than 10 percent higher, had Israel not followed a policy of revoking residency rights from anyone who left the area for an extended period of time. The West Bank’s population growth rate is 3 percent. Many of those prevented from returning were students or young professionals, working aboard to support their families.