Argentina’s Martin Guzman, a whiz-kid economist with close ties to influential U.S. economist Joseph Stiglitz, will bring a sharp academic intellect but little policy-making experience to the daunting task of reviving Latin America’s third-largest economy and averting a damaging default. Guzman, a debt specialist at Columbia who has a doctorate from Brown University, was confirmed as economy minister on Friday evening in the new cabinet of President-elect Alberto Fernandez, who takes office on Dec. 10.…