The microeconomic picture of the U.S. has changed immensely since 1973, and the trends are proving to be consistently downward for the nation's high school graduates and high school drop-outs. "Of all the reasons given for the wage squeeze - international competition, technology, deregulation, the decline of unions and defense cuts - technology is probably the most critical. It has favored the educated and the skilled," says M. B.Zuckerman, editor-in-chief of U.S. News & World Report (7/31/95). …