WASHINGTON, Dec 9 (Reuters) - The U.S. government said on Monday it made an error in a key monthly jobs report that affected the payroll trends during September and October and will being re-issuing its most recent data.
The Labor Department released its November employment report on Friday showing payrolls fell by 40,000 last month, after a 6,000 gain in October. The report had said September payrolls fell by 4,000.
The department also had said the unemployment rate shot up to 6 percent in November from 5.7 percent in October.
The unemployment data will not be affected by any of the changes because it is based on a survey of households and is separate from the survey of business establishments that is used to compute the payroll numbers.
John Castle, economist with Labor Department's Bureau of Labor Statistics, said the most recent employment report would be replaced by another report to fix the problem.
The newly revised report will be issued over the Internet on the bureau's Web site (http://www.bls.gov/ces).
The month-to-month changes for payrolls in September and October were likely to be affected but it was not clear how they would be changed.
Castle would not say whether either figure would be revised up or down.
He said there would be further changes to the report that have to do with the communications industry's hours worked and hourly earnings series.
He would not say whether there would be amendments to the overall November numbers for the average workweek or average hourly earnings, which are also closely watched by markets.
On Friday, Labor said November's average workweek stayed steady at 34.2 hours and average hourly earnings rose 0.3 percent to $14.93.
"This release incorporates additional corrections for nonsupervisory workers estimates in the communications industry for October and November 2002," Castle said, reading from a statement that Labor planned to release on the Web. "These corrections resulted in minor revisions in some hours and earnings series for these two months."
The payroll error was apparently brought to the attention of the government by Stone & McCarthy Research Associates, a firm that analyzes data and issues commentary read by many traders on Wall Street.
Economist Ray Stone of the Princeton, N.J.-based firm said he noticed something was amiss when the October and September payroll numbers seemed to be at odds with his forecasts. He said the mistake had to do with how the department smoothed out the series to adjust for seasonal fluctuations in hiring.
He alerted the BLS late on Friday and he said they worked through the weekend to pore over the figures and find out if there was indeed an error.
The Bureau of Labor Statistics has had a handful of other snafus in recent years, one of which involved an error discovered in the Consumer Price Index and two of which concerned the accidental posting of some data ahead of the scheduled release time.
In September 2000, the bureau was forced to make a slight revision to the CPI because of an error stemming from the way the bureau measures air conditioning in housing units.
It accidentally posted some components of the jobs report a day ahead of schedule in November 1998, causing a stir in financial markets. In January 1999 it put market-sensitive information on producer prices ahead of schedule onto its Web site.
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