Kevin Carmichael's Observer: The G20 showed in Brisbane that it is back, but for how long?

Like many others, I was down on the Group of 20 on the eve of the Brisbane summit. After a few pleasant surprises on the weekend, the group has earned a reprieve from questions about its relevancy. However, leaders did less than they could have on trade and economic growth, setting up 2015 as a defining year in the G20’s ability to deliver. 

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