In an open letter posted on its Web site, the Alliance of Motion Picture and Television Producers said below-the-line workers "whose families depend entirely on our industry have already lost more than $200 million in the Los Angeles area alone and the healthcare benefits for many of these families are now in real jeopardy because of the WGA strike."

The AMPTP, which broke off talks with the WGA earlier this month, also said the writers have lost more than $115 million and are no closer to getting an increased share of new media revenues than they were when the strike began Nov. 5.

"The economic impact to our regional economy is also growing. By January, the economic losses to the region will exceed $200 million a month, with as many as a third of the entertainment industry's 250,000 jobs jeopardized," the letter said.

"Unfortunately for all of us, the WGA's existing unreasonable, inconsistent and impractical negotiating strategy is guaranteed to produce only losers in this strike."