In January, the statewide unemployment rate fell by 0.1 percent to 6.4 percent.
Mike Tavernise, manager of the Raleigh branch of the N.C. Employment Security Commission, said the drop might result from a change in statistical figures.
"I'm not sure if it is an actual decline or better statistical numbers," he said, explaining that the December data was based on the 1990 census and the January data on the 2000 census.
But Tavernise said he thinks there has been a pickup in blue-collar or service sector jobs.
He added that white-collar jobs, especially those with high-tech companies, have been on the decline.
Tavernise said some white-collar workers have moved to the service sector to find work because the number of jobs in the industry has increased.
"They have to make that hard decision," he said.
He said that as a result, the service industry has become more competitive.
Tavernise said the trend is a reversal from the norm, when workers usually shift from the service industry to the more competitive white-collar industry.