I think it’s great that people are becoming more interested in this issue!
Check out this article posted on theguardian.com: http://www.theguardian.com/global-development-professionals-network/2015/mar/13/white-people-expats-immigrants-migration
…and another article from the Wall Street Journal blog! http://blogs.wsj.com/expat/2015/04/02/expat-under-fire-a-global-nomad-argues-against-those-saying-its-racist/?mod=e2fb
Check out my own research on this topic:
Towards the end of each interview with 27 Americans living in Buenos Aires, I asked the participants to define the word “expat” (the overwhelming majority had already mentioned the term at some point or another during the interview).