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Wed Jan 2, 2013 6:45pm IST

1 of 24. A woman celebrates the New Year as she watches fireworks exploding above Copacabana beach in Rio de Janeiro January 1, 2013. More than two million people gathered along Rio's most famous beach to witness the 20-minute display and celebrate the beginning of a new year.

Credit: Reuters/Pilar Olivares

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After wave of QE, onus shifts to leaders to boost economy

DAVOS, Switzerland - Central banks have done their best to rescue the world economy by printing money and politicians must now act fast to enact structural reforms and pro-investment policies to boost growth, central bankers said on Saturday.