Look for Wohnungsgenossenschaft or Wohnungsbaugenossenschaft. They are relatively common in Germany and Austria; Vienna is an example where the majority of flats are owned by such cooperatives. In Hamburg roughly 14% of all flats in the city are being provided by cooperatives which has huge advantages for those who get to become members.

All sources I know are in German language so if you want to read further just go for these texts and translate them into your mother tongue. Maybe start with Wikipedia:

https://de.m.wikipedia.org/wiki/Wohnungsbaugenossenschaft

You got a point there, and there may be a lot of data to prove that point.

I am part of a housing cooperative (“Wohnungsgenossenschaft” in German), and these cooperatives are noticeably cheaper because they are owned by the members/renters and don’t have to generate any profit, just enough excess money to build new homes. The principle is very convincing if you live in it and save loads of money every month. The cooperatives employees aren’t overworking themselves, too.