Following the letter of Canada’s PM Stephen Harper, the G20 did something extraordinary: they’ve agreed to specific dates and amounts for fiscal deficit reduction.

“There is a risk that synchronized fiscal adjustment across several major economies could adversely impact the recovery. There is also a risk that the failure to implement consolidation where necessary would undermine confidence and hamper growth. Reflecting this balance, advanced economies have committed to fiscal plans that will at least halve deficits by 2013 and stabilize or reduce government debt-to-GDP ratios by 2016.”