The brain drain withinThe Chronicle of Higher Education.
This exodus occurs in two forms: scholars obtaining top-level jobs outside of academe in their home countries, and scholars migrating to better paying university jobs in more developed African countries. In almost every case, the universities losing talent are also losing the time and resources they spent to cultivate their faculties. In one way or another, the universities often have mobilised considerable funds for their professors to receive four or five years of graduate education in the developed world. They have also in many cases provided research grants and money to travel to conferences.
Full report on The Chronicle of Higher Education site