This Book Analyses The Outflow Of Highly Qualified And Talented Human Capital From Underdeveloped Countries Where It Can Make Significant Contributions To The National Welfare Of Developed Countries, Which Are Already Well Supplied With Trained Personnel. Logical Understanding Of The Brain-Drain Process Is Attempted On The Basis Of Response Settled Abroad. The Estimates Of The Magnitude Of The Brain Drain Are Based On Some Systematic Studies Conducted At Iit, Bombay. This Work Also Distinguishes Between The `Real` And The `Apparent` Brain Drain.