The FTC Guidelines for Collaborations Among Competitors https://www.ftc.gov/sites/default/files/attachments/dealings... says it’s illegal to share “competitively sensitive variables”, not just any data. Some forms of data sharing such as industry averages may not be illegal, but more detailed data such as numbers of applicants or price elasticity that enable the companies to act together as if they were a monopoly probably are. RealPage crossed the line by sharing an optimization algorithm and encouraging collective action. I’m not sure what Pave does.