In the 1980s and early 1990s, a substantial number of U.S. companies announced major restructuring and downsizing. But we don't know exactly what changes in the U.S. and global economy triggered this phenomenon. Little research has been done on the underlying causes of downsizing. Did companies actually reduce the size of their workforces, or did they simply change the composition of their workforces by firing some kinds of workers and hiring others?...