Larry Summers has been at the forefront of economic thinking for decades - a World Bank chief economist, Professor at Harvard and U.S. Treasury Secretary. He's also warned that the global economy is in the midst of secular stagnation. In this episode, he tells Betsey Stevenson and Justin Wolfers why the economy is stagnant, in spite of low interest rates. The three economists also discuss why their field is so influential, and Larry reveals how policy makers get things done.

Editor: Alastair Elphick. A Modulated Media production.