At a Chicago spectrum summit hosted by the Wireless Communications Association (WCA) on Monday, representatives of the mobile telephony and broadcast industries clashed on wireless industry claims that incentive auctions of broadcast television channels are needed to avert a looming shortage of spectrum resources that are required by carriers to satisfy burgeoning demand for wireless broadband services. While acknowledging that the use of spectrally efficient technologies and the offloading of data traffic onto Wi-Fi networks could help alleviate the spectrum crunch, representatives of Sprint Nextel, AT&T and Verizon voiced support for the FCC’s proposal to conduct voluntary incentive auctions of broadcast spectrum as well as for the repurposing of mobile satellite service (MSS) that could be used for wireless broadband applications. Arguing that the broadcast industry’s model for delivering video programming is “not a winning proposition,” Recon Analytics co-founder Roger Entner endorsed the call for incentive auctions as he proclaimed the wireless industry to be “the most efficient user of spectrum.” Casting doubt on wireless industry claims of a looming spectrum shortage, however, National Association of Broadcasters vice president Bruce Franca cited statistics recently compiled by Citigroup Global Markets, Inc. demonstrating that U.S. wireless carriers currently utilize only 192 MHz of the 538 MHz allocated by the FCC to their industry. Franca, a former chief of the FCC’s Office of Engineering and Technology, also told conference participants that “there’s a lot . . . the FCC hasn’t thought about” in developing its incentive auction plan, as he recounted NAB estimates that incentive auctions could force at least 391 full power and Class A television stations in 86 markets off the air. Franca also disputed assertions by Sprint Nextel that only ten million Americans rely on over-the-air television channels that could be auctioned to the wireless industry, citing estimates provided by Knowledge Networks that upwards of 47 million Americans and 25% of Hispanics nationwide rely on over-the-air service.