US Treasury Secretary John Snow said the outlook for the US economy is one of "continued robust expansion". Snow told a news conference that, in the US, "strong growth is also working to boost revenues." However, "unfortunately economic growth in key continental European countries has been persistently weak for too long" - a topic was discussed at recent G8 meetings, he added. Reiterating concerns expressed by other senior members of the US administration, Snow said he has this week emphasized to EU leaders "the need for Europe to implement vigorous structural reforms to boost its potential growth, jobs and incomes." Meantime, "it is clear that adjustments of global imbalances will be difficult when US rates of growth are substantially higher than those in Europe." Snow's European trip has centred on the particular issues of financial market reforms and regulatory issues, with Europe's attempts to converged 25 different financial systems into a single market was a focal point of his talks with EU Commissioner Charlie McCreevy and financial leaders. "Our Trans-Atlantic relationship is the nexus for the lion's share of the world's financial market participation, so we have a unique and shared responsibility to ensure for the efficient performance of markets and smooth adjustments in global accounts," he added.