A jury has found that concert giant Live Nation and its Ticketmaster subsidiary had a harmful monopoly over big concert venues, dealing the company a loss in a lawsuit over claims brought by dozens of U.S. states. A Manhattan federal jury deliberated for four days before reaching its decision Wednesday in the closely watched case, which gave fans the equivalent of a backstage pass to a business that dominates live entertainment in the U.S. and beyond.Live Nation Entertainment owns, operates, controls booking for or has an equity interest in hundreds of venues.