Canada's Harper was urging the countries to agree to concrete deficit-reduction goals as a way of restoring investor confidence following the turmoil caused by the Greek debt crisis.
Leaders differ on how to nurture a global recovery →
"Because of the tight budgetary situation we are seeing in many countries, leaders are being very cautious as to the pledges they have made," he said. "I'm confident that money will be delivered."
World leaders differ on how to nurture global economy →