“We see lots of tenants not renewing their leases, going either fully remote, or renewing their leases but signing up for less space,” said Stijn Van Nieuwerburgh, one of the authors of the paper, and a professor specializing in real estate at Columbia Business School. “It all adds up.”

https://www.nytimes.com/2022/11/17/business/office-buildings-real-estate-vacancy.html