long read, starts at page 1 or 2...the preface is long and boring....one can scan to get the idea.
http://microfinancegateway.org/files/22482_14.doc
"on the role of Diaspora communities in reducing poverty in their home countries. This is a narrower focus than the more common question of the links between migration and development, or indeed the role of Diaspora in development. Migration does not always result in the long-term dispersal of a people; some migrants leave their home countries only temporarily, or assimilate into countries of settlement so completely that they lose their distinctive identity and ties to their homelands. And while poverty reduction is assumed to be one of the benefits of development, the relationship is far from linear. In other words, migration does not always result in the formation of a Diaspora community; and development does not always lead to poverty reduction, at least in the short-to-medium term. This paper analyzes the impact of established Diaspora on lifting people in their traditional homelands out of poverty, and identifies ways in which policy interventions, especially from donors of official development assistance, might strengthen that impact. In a few cases, the actions of Diaspora are perverse, and contribute to perpetuating poverty. In such cases, the aim of donor governments is to prevent or at least mitigate such actions."