Congress hasn't done anything too dangerous in a few months, the Federal Reserve is once again moving to support recovery, and Labour markets are looking more buoyant than they have in some time.

国会已有几月未有过于危险的动作，联邦储备再行出手支持经济复苏，劳动市场也较前一段时间更为景气。

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"This is an impressive combination of extremely tight labour markets and extremely well-behaved labour costs, and that is the reason why the Fed (Federal Reserve) will continue moving at a very cautious pace, " said Anthony Karydakis of Bank One Capital Markets.

BBC: US productivity grows 5%

Once the reserve army is exhausted and as long as we maintain that competition among capitalists for access to the labour, the profits that can be made from labour, then inexorably and without doubt labour incomes will rise in line with productivity again.

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