It used to be that if you’re the type of person who always has a job, you’re the type of person who can always find a job.

But a new analysis of job-finding rates complicates that picture. The study from the Federal Reserve Bank of Richmond examines three types of workers and how they’ve fared in their job search.

“Primary workers,” who make up about 55% of the US labor pool, are “almost always employed,” per the analysis. They have steady work histories and usually only show up in unemployment statistics when something has gone wrong.

Historically, primary workers had the best odds of finding a new job. But their job-finding rates have fallen…