From https://www.thebignewsletter.com/p/monopoly-round-up-time-ba...

> Our work against algorithmic rent-fixing is starting to bear real fruit. Multiple cities have passed laws prohibiting corporate landlords from using rent-fixing software, including San Francisco, San Diego, Seattle, Philadelphia, and Providence, RI. These laws aren’t complex and don’t require unwieldy market definition, you just have to show that the defendant is using nonpublic information in an algorithm to set prices. And they are being enforced, with six different lawsuits now pending.