In the April 2006 issue of Scientific American
, Pranab Bardhan (econ prof at UC Berkeley) asks "Does Globalization Help or Hurt the World's Poor?" In the process of answering this question, he offers this input into the immigration debate:
A program to permit larger numbers of unskilled workers into rich countries as "guest workers" would do more to reduce world poverty than other forms of international integration, such as trade liberalization, can. The current climate, however, is not very hospitable to this idea.