Describe brain drain and its impact on an economy. What is reverse brain drain?

What will be an ideal response?

Brain drain is the departure of highly educated people from one profession, geographic region, or nation to another. Brain drain can negatively affect an economy if individuals needed for economic development, such as science and technology professionals, move elsewhere. Many countries in Eastern Europe experienced high levels of brain drain early in their transition to market economies. Economists, engineers, scientists, and researchers in all fields fled westward to escape poverty. But as these nations continue their long march away from communism, some are luring professionals back to their homelands—a process known as reverse brain drain.