The Henderson Let Em In Club
By Arnold Kling
82 Percent of Haitians above this poverty line [$10 per day] are here in the United States. (I calculate this with Lant Pritchett here, ungated version here.) Only the top 1.4 percent of people in Haiti had that living standard even before the quake, and there is no evidence that Haitian emigrants come primarily from the extreme tip-top of the income distribution. So for most of Haitians who left, leaving Haiti was the cause of leaving poverty.
[UPDATE: so is Michael Spence, in the latest econtalk. I think the interview picks up about half way through.]