Federal antitrust regulators should keep an eye on Google’s travel practices. That summarizes the sentiments of Barry Diller, the chairman and senior executive of Expedia Group and IAC/InterActiveCorp. Diller spoke Tuesday with CNBC’s Andrew Ross Sorkin at a talk at the Economic Club of New York. “Google and Facebook own basically the advertising business worldwide,” Diller said. “Google certainly has a monopoly [on search volumes and digital ad sales] in Western Europe.” Get the full story at Skift