Indeed, Mr. Poltrack said, shows that change nights almost invariably see some degree of audience erosion, generally from 5 to 15 percent.

We think the commercial audience erosion is worse than admitted.

So, early on the word quickly went out in network corridors: innovation, that would be the key to stemming the tide of audience erosion.

But they are aware that as a television production, the Oscar show, while still very successful, has suffered audience erosion in the last few years.

A perception that his successor, Fred Sherry, presented too much new music caused further audience erosion.

A time change to a 4:30 start also caused some audience erosion.

Over all it's declining market share, further audience erosion.

The show was cancelled in July 2008 after experiencing audience erosion and controversy.

The situation is more competitive than ever, he added, and audience erosion continues.

Because of the audience erosion, the move to 90-minute installments is generally regarded as a failure.