Labor Displacements. Mobility and Flexibility in the New Global Market of Knowledge - The outsourcing of work is today, for the American middle class, cause of a real obsession. The middle-class, for the first time, fears, from a point of view of working, of being left to drift. The author of this essay tells the complex, and far from obvious, dynamics of purchase of labor between the United States of America and the great new emerging powers (India and China, first of all) in the knowledge economy.