31.   Many experts have attributed the drop to increased use of contraception and the aging of the baby boom generation.

32.   Many health experts attribute the rise to growing air pollution.

33.   Now, however, the FTC is regaining some balance, a result that antitrust experts attribute to a longstanding friendship between Pitofsky and Ms. Bingaman.

34.   One expert attributes an unprecedented growth in astrology, religious converts, cults and sightings of ghosts to a loss of optimism and faith in traditional institutions.

35.   Other factors were certainly involved in that growth, but many experts attribute the overcrowding in large part to the tougher sentencing schemes.

36.   Pollack, a psychiatry professor at Harvard Medical School, describes problems that many experts have attributed to girls, including low self-esteem and feelings of loneliness and isolation.

37.   Public health experts attribute most of the spread of AIDS among blacks to drug use.

38.   Some experts attribute the high mortality rate to something other than nature or simple bad luck.

39.   Some experts also attribute youth violence to video games and television.

40.   Some experts attribute it to individual choices, with men who are the sole breadwinners working longer, producing more and pushing harder for raises and promotions.