Peter Blair Henry

Economists have spent years bemoaning the long-term stagnation of the advanced economies and drawing unflattering comparisons with the dynamic growth in the powerhouse emerging economies, but is it time to change the tune? The US economic motor is showing signs of life, just as nervousness is sweeping financial markets from Jakarta to Brasilia. Stephen Sackur speaks to leading American economist and former Obama adviser Peter Blair Henry. He's just written a book about the turnaround in relations between rich and emerging nations; is it already out of date?