A study was made to determine: (1) which students apply for financial aid; (2) which students receive financial aid; (3) the role of medical schools, federal and state governments, private foundations and lending institutions, and the student and their parents in supplying the income needed to meet student expenses; and (4) the types of income (e.g., loans, scholarships, family contributions, etc.) important in financing medical students. The data base used in this study was derived from a representative national sample of 7,261 anonymous questionnaires, which included 15 percent of the total enrollment of each of the 110 medical schools participating in the survey. Comparisons are made for three major groups of students: (1) those who did not apply for aid; (2) those who applied for but did not receive aid; and (3) those who applied for and received aid. The above groups are then analyzed by their demographic background characteristics and the amount of income received from funds such as scholarships, loans, contributions from parents and relatives, and student earnings and savings. (Author/SPG)