With companies like Amazon, Google and Facebook showing no signs of relinquishing dominant positions in the U.S. marketplace, a panel of experts questioned whether U.S. antitrust laws are still effective in the age of the high-technology behemoths.

Jason Furman, former chairman of the Council of Economic Advisers, told a recent forum sponsored by the antitrust law section of the New York State Bar Association that the price advantages to consumers of the high-tech companies may have been too large a consideration in the minds of regulators, as the companies have been allowed to branch out and acquire would-be competitors in recent years.