Google is willing to cough up more advertising data to publishers to address concerns about its illegal monopoly over digital advertising technology, a top executive at the search giant said Tuesday.Glenn Berntson, an engineering director for Google Ad Manager, acknowledged the potential remedy during the second week of a high-stakes antitrust trial in Virginia federal court. He was called as a witness by Google’s defense lawyers.Providing “publishers with these detailed insights, I think, is a good idea,” ...