US factory orders dropped by their largest amount in six-and-a-half years in January, official figures showed.
Orders for big-ticket items fell even faster, the data from the Commerce Department showed - down 8.7%, even wose than an earlier 7.8% estimate.
the US had slowed, while labour costs soared.
Both sets of data point to a slowdown in the world's largest economy, and could fuel inflation concerns.
The Commerce Department data showed that a main contributor to the manufacturing slowdown had been lower transportation orders, which fell 19%, and included a 60.2% drop in demand for commercial planes.
While durable goods fell 8.7%, order for non-durable goods - which include petrol and food - were down only 2% in January.
Profitability
The US Labor Department figures had shown that productivity per worker - a measure of hourly output - grew by 1.6% annually over the three-month period.
The decline in productivity growth contributed to a rise in unit labour costs of 6.6%, well above an original estimate of 1.7%.
A combination of slowing productivity gains and higher wages could fuel inflation if sustained.
The rise in labour costs was the most dramatic since the first three months of 2006, which had a 9.1% increase.
The economic data follows soon after the US released figures showing economic growth in the last three months of 2006 was 2.2%, well below the original estimate of 3.5%.
BBC News