From County-Level Drivers Of Disability Benefit Claims In Times Of Covid-19 by R. Vincent Pohl and David R. Mann:
... Counties that were closer to as SSA field office experienced larger declines in SSI and SSDI application and award rates between 2019 and 2020 compared with counties further away from the nearest field office.
SSDI application rates grew more in counties with a larger increase in unemployment rates.
Changes in SSI and SSDI application and award rates were not consistently associated with levels of COVID-19 cases and deaths. ...
Applying for disability benefits in person at an SSA field office seems to be an important factor. When field offices closed early during the pandemic, it affected potential applicants for SSI and SSDI who would have otherwise likely applied in person and were less likely to do so due to field office closures. ...
I don't understand how they can say that SSDI application rates "grew" more in areas with high unemployment when application rates were actually declining. Maybe they declined less in areas with more unemployment but they weren't going up.