As it happens, the Bureau of Labor Statistics does an exceedingly thorough job of documenting how it generates its numbers. It has a bunch of explanations on it

As it happens, the Bureau of Labor Statistics does an exceedingly thorough job of documenting how it generates its numbers. It has a bunch of explanations on its website. A good starting point might be the general overview of their job openings survey: https://www.bls.gov/opub/hom/jlt/data.htm https://www.bls.gov/opub/hom/jlt/data.htm