This move by the European Central Bank is complicated stuff, and we've asked economist Kenneth Rogoff to help explain it a bit further. He's professor of economics at Harvard and former chief economist at the International Monetary Fund.
Welcome back to the program.
KENNETH ROGOFF: Thank you.
SIEGEL: And the first question: In general, is this another incremental, stopgap measure to hold the eurozone together? Or is the European Central Bank and Mario Draghi, are they announcing a game-changer here?
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