A CORPORATION OF ONE: U.S. companies that employ nobody but the owner soar, but some worry it won’t help overall job growth.

The number of businesses classified as manufacturers with no employees has been rising steadily since the depths of the recession. The tiny operations often make food, craft beer, toiletries or other niche products. Their growth stands out in a sector that has been shedding workers for decades.

U.S. food manufacturers with no employee but the owner nearly doubled from 2004 to 2014. One-worker beverage and tobacco makers expanded 150%. Such chemical manufacturers—a category that includes makers of soap and perfume—grew almost 70%.

In all, there were more than 350,000 manufacturing establishments with no employee other than the owner in 2014, up almost 17% from 2004, according to the most recent Commerce Department data. By comparison, there were 292,543 establishments with other employees, down 12%. The shift creates a challenge for building back the number of jobs in the U.S. manufacturing sector.

Technology is making it possible for almost anyone to become an entrepreneur, and that’s supposed to be a bad thing?