I think the problem is worse than just algorithms. If something is around long enough, it'll naturally evolve an implicit coordination, as those who don't coordinate die out.
Its not hard for a landlord to open zillow and see what the comps are going for... that's what I've been thinking the whole time that there is already enough market information to coordinate.
There must be some difference between zillow rents (open units) and the rents being paid by existing tenants or tenants who renew leases, right? You'd expect zillow prices to be a little higher at least, and it could have a huge distortion.
