It must be kept in mind, however, that while this represents a gain for the United States, such an inflow of highly skilled personnel represents a loss for the country of emigration. This has been aptly captured by the phrase brain drain. But in a world of global competitive, the manager must forecast the firm ‘ s need for skilled labor and hire it from abroad when not available domestically. If that is not possible, the firm may have to consider moving some of its operations abroad. Since the terrorist attack of September 11, 2001, the United States has tightened visa rules and this is slowing down the vital flow of professionals admitted into the United States . The United States is also slipping in attracting the world ‘ s best students.