A new estimate by Nouriel Roubini's consulting firm, Roubini Global Economics, predicts that municipal bond defaults could hit the $100 billion mark over the next five years.
Nouriel Roubini and political scientist Ian Bremmer have developed a new conceptual framework for understanding the economic and political challenges of the 21st century: The G-Zero World.
World power is at a point where neither a single nation nor a block of countries will be able to drive their own agenda, Ian Bremmer, president of Eurasia Group, told CNBC on Tuesday.