Back in April I posted a longer piece speculating on the reasons behind the declining number of Social Security disability claims being filed. I'm sure that we can't credit any reduction in unemployment for what is going on at the moment. The number of disability claims is continuing to decline even though there's been little or no decline in the unemployment rate in the last two years. What is causing the decline isn't clear.
I ended the piece by speculating that at least some of the decline may be due to declining service at Social Security discouraging claimants from applying. I admitted that I had no evidence to support this theory. However, I had forgotten about a study that does support this theory. About two years ago I had posted about a study done by a couple of researchers about what happens to the number of disability claims filed when Social Security closes a field office. They found that the number of claims declined because people with lower education levels and lower earnings were discouraged from applying. The effect they found, 11%, was significant and the effect persisted.
Social Security hasn't closed that many offices. What's happened is that service has declined at the offices which are still open. It's harder to get through to Social Security over the telephone. Your wait time if you visit in person is longer. People get discouraged and give up.
This issue merits more study but I think the discouragement theory looks like a major factor in the decline in the number of disability claims.