Using the hashtag #PayUpHollywood, assistants working in the entertainment industry have been agitating in recent months for higher wages and more considerate treatment from their sometimes mercurial bosses.

The assistants scored a small victory recently, when Creative Artists Agency, one of the Big Four talent agencies in Los Angeles, announced that it was raising pay for its hourly workers, a group that includes assistants, mailroom clerks, receptionists and agent trainees.

Assistants will earn $18, up from $15, according to a spokeswoman for the agency. C.A.A. declined to disclose the increases for other hourly workers or when the changes would take effect.

C.A.A. is the latest Hollywood company to respond to the effort by assistants, who have argued that low pay often means that only people from privileged backgrounds can afford to take entry-level jobs, which has limited diversity in the industry.