NBC chief Jeff Zucker seemed to imply Wednesday that Fox Broadcasting's ascent to the top of the ratings heap this year may have had a lot to do with the fact that it airs only 15 hours of television programming per week compared to the other networks' 22, allowing it to be more selective in its content choices. Speaking at the Ad Age Digital Marketing Conference in New York, Zucker predicted that all of the other networks will be cutting back on the number of scripted television shows they will offer, because they are financially burdensome. "It is harder today to put on 22 hours of great scripted programming," he remarked. "The costs are prohibitive." In the future, he added, "you're still going to see the great scripted programming, but you're not going to see 22 hours a whole week anymore."