 When we think of the contribution of diaspora, for the most part we think of the contribution they make to their countries of origin. But in fact they make a contribution to both the environment in which they currently live and an enormous contribution to their countries of origin. There are several aspects to that contribution that the most commonly referred to is what are called remittances. For people who have moved to a new country, they spend about 85 percent of their income in their new country, their country of destination, but they send home on a very regular basis for a very long time, about 15 percent of their income. That amount globally is three times the amount of official government aid, that is the amount of money that governments in developed countries send to developing countries. So it's an enormous contribution in the range of close to 500 billion dollars a year. And in some countries, poorer countries, it amounts to up to 20 percent of their gross domestic product. So financially they are huge agents of development.