In this episode of Head to Head, Mehdi Hasan challenges Sir Paul Collier, the former head of Development Research at the World Bank, author of Exodus: Immigration and Multiculturalism, and professor at Oxford University, on the costs and benefits of migration.

More from Head to Head on:
YouTube - http://aje.io/4a46 
Facebook - http://facebook.com/AJHeadToHead 
Twitter - http://twitter.com/AJHeadToHead
Website - http://aljazeera.com/headtohead

In this episode of Head to Head, Mehdi Hasan challenges Sir Paul Collier, the former head of Development Research at the World Bank, author of Exodus: Immigration and Multiculturalism, and professor at Oxford University, on the costs and benefits of migration. More from Head to Head on: YouTube - http://aje.io/4a46 Facebook - http://facebook.com/AJHeadToHead Twitter - http://twitter.com/AJHeadToHead Website - http://aljazeera.com/headtohead

Interviews with attitude, tackling the big issues of our time with Mehdi Hasan.

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