An analysis of U.S. Census data regarding race, age, education, occupation, and income of the male civilian labor force in 1960 and 1970 yields four major conclusions. (1) There have been large reductions in occupational discrimination at all ages, with the change clearest for young men. (2) The reduction of occupational discrimination is clearest at the lowest and highest educational levels. (3) The absolute gap between black and white income (in constant dollars) has increased. (4) The increased income gap is due in large part to a general shift upward in educational level of the labor force. Comparisons are made with changes from 1950 to 1960 and more detailed analyses provide some suggestions as to differential sources of change in the two decades. (Author)