Confronting the worst job market in decades, many college graduates who expected to land paid jobs are turning to unpaid internships to try to get a foot in an employer's door.

While unpaid postcollege internships have long existed in the film and nonprofit worlds, they have recently spread to fashion houses, book and magazine publishers, marketing companies, public relations firms, art galleries, talent agencies - even to some law firms.

Although many internships provide valuable experience, some unpaid interns complain that they do menial work and learn little, raising questions about whether these positions violate federal rules governing such programs.

"A few years ago you hardly heard about college graduates taking unpaid internships," said Ross Eisenbrey, a vice president at the Economic Policy Institute who has done several studies on interns. "But now I've even heard of people taking unpaid internships after graduating from Ivy League schools."

Yet interns say they often have no good alternatives. As Friday's job's report showed, job growth is weak, and the unemployment rate for 20- to 24-year-olds was 13.2 percent in April.

The Labor Department says that if employers do not want to pay their interns, the internships must resemble vocational education, the interns must work under close supervision, their work cannot be used as a substitute for regular employees and their work cannot be of immediate benefit to the employer.

But in practice, there is little to stop employers from exploiting interns. The Labor Department rarely cracks down on offenders, saying that it has limited resources and that unpaid interns are loath to file complaints for fear of jeopardizing any future job search.

No one keeps statistics on the number of college graduates taking unpaid internships, but there is widespread agreement that the number has significantly increased, not least because the jobless rate for college graduates age 24 and under has risen to 9.4 percent, the highest level since the government began keeping records in 1985. (Employment experts estimate that undergraduates work in more than one million internships a year, with Intern Bridge, a research firm, finding almost half unpaid.)

Source: The New York Times