Much research has been done to investigate the causes of dropping out and to explore ways to enhance retention. College officials are quick to cite two issues that to a considerable extent are beyond their control: financial pressures and poor academic preparation in high school.

For 19-year-old Kassandra Nuenoom of Westminster, Vt., financial pressure was a major issue. A top student in a vocational high school and the first in her family to attend college, Nuenoom enrolled in the horticultural school at the University of Massachusetts in Stockbridge with some scholarship assistance. But she found it difficult to find the right balance of school and work. “I had to pay for school myself,” she said. “I have a car and have to pay car insurance, expenses, food — and I have my own apartment. I was working 35 hours a week and going to school full time. I was overwhelmed and got very sick.”

The situation was complicated by the fact that she was taking classes that were more focused on agriculture than on her main interest — horticulture. “I did well in my classes, but I was not sure if I should still spend so much money on schooling,” Nuenoom said. She decided to drop out of school and try to “understand what I really want to do.”

She is now working as a floral designer at a large farm stand in southeastern Vermont but has begun taking business courses on the Internet. “Now I am ready to take classes again,” she said. “I am the type of person who needs to understand what I am good at. I want to have my own business, such as a wedding shop, in the future. Now I can connect what I am learning to my future business.”

Kassandra Nuenoom’s story illustrates how important it is for postsecondary students to properly manage their finances. Nuenoom admits now that she did not have a clear understanding of how financial aid worked at Stockbridge or what financial counseling services were available. “By the time I found it, it was too late,” she recalled.

Substantial research shows the importance of realistic financial aid policies. A 2003 NCES study of students who received financial aid in their first year at four-year institutions concluded that those who received more aid were less likely to depart within three years than those who received less aid. Other studies have demonstrated the positive impact of financial aid on students’ persistence, especially when the aid takes the form of grants or scholarships as opposed to loans, which are now the most common form of financial aid.

Officials report that many low-income students are understandably reluctant to incur debt and prefer to take part-time — or even full-time — jobs, as Nuenoom did. But such a strategy can become counterproductive if it reaches the point where students cannot concentrate sufficiently on their studies. The gradual shift in federal financial aid policy in recent years toward greater reliance on loans rather than grants does not bode well for low-income students.

Researchers also have confirmed the importance of a solid high school curriculum for college persistence and retention. Using NCES data, Susan Choy of MPR Associates found that, among students entering a four-year institution, 87 percent of those who had taken a rigorous curriculum in high school — especially in math — were still on track to a bachelor’s degree three years later. This compared with only 62 percent of those who had followed a basic high school curriculum. Clifford Adelman, a senior research analyst at the U.S. Department of Education, adds that the academic intensity and quality of the high school curriculum is particularly important for the persistence of African-American and Latino students.

But some trends in high school preparation may be going in the wrong direction. The proportion of college students taking at least one year of remedial coursework rose from 28 percent to 35 percent between 1995 and 2000, according to NCES data.

Some experts warn that it’s easy to overstate the link between poor academic preparation and dropout rates. “Colleges like to say that the No.1 reason is underpreparedness — but the reality is that only a quarter of those who do not return for sophomore year will have left in poor academic standing,” said John Gardner, an expert on retention issues and a Senior Fellow at the University of South Carolina. “I’ve always operated on the assumption that all students are at risk.”