Landlords in Buenos Aires have raised the rent on apartments more than 60% ahead of a new law that gives the government control over price increases. But in one global metropolis, rents are surging like never before. Tenants in Buenos Aires City are seeing apartment prices soar 67 percent from a year ago to an average of about 35,000 pesos a month (US$377). Rent is now rising twice as fast as paycheques, and well ahead of other prices in one of the largest cities in Latin America. “We never imagined…