This study focuses on the role of student earnings as a source of financial support for postsecondary education and the trends in the various components of total earnings over the past ten years. Also studied is the disposition of these earnings between educational and noneducational use. It was found that the average full-time undergraduate earned $1,195 in 1970, a 64 percent increase over 1960 (25 percent increase in real terms). A higher proportion of students worked in 1970 compared to 1960, and they worked slightly longer hours. The study also shows that the share of student outlays financed by earnings rose during the 1960's, from 31 percent to 41 percent, for single, full-time undergraduates. Part of this significant increase is due to more students in 1970 choosing less costly educational settings. (Author)