As the country's most formidable broadcaster of online streaming radio -- that is the company that actually provides the network bandwidth to the stations -- releases its audience metrics, some are comparing radio to a ubiquitous music provider, a measuring stick that doesn't get to America's economic momentum. The leading provider of local information in the US, the one that gets consumers on their daily commutes, is radio. There is no more relevant ad placement for local business, the very engine that pushes the US economy. Yet analysts are suggesting that the national brand may play a more critical role for advertisers. While that may have the potential for significant impact for national brands like Pepsi and McDonald's, Big Tomato Pizza, a Des Moines brand, would find itself drowning in a sea of clutter if it turned to Pandora for its recognition. They say all politics is local. While the subjects of politics and local business differ substantially, th...