MediaPost: Advertisers have yet another way to make national ad buys across multiple newspaper publishers. Tribune Publishing has launched the MediaWorks Publisher Consortium, enabling advertisers to create print and digital ad campaigns spanning newspapers in the country’s top media markets.Among other benefits, the network offers members proprietary first-party subscriber data that should allow them to target ads more precisely. At launch, the network consists of Tribune’s own properties, as well as a number of newspapers owned by other publishers.