One interesting things that Singapore does is that it collects and shares all rental data. When you lease a place to a tenant, there is a stamp duty ($100+) th

One interesting things that Singapore does is that it collects and shares all rental data. When you lease a place to a tenant, there is a stamp duty ($100+) that the tenant pays. Then the landlord submits details about square footage, number of rooms, and the price it was rented at. Then the government shares the data in an aggregate manner: https://www.ura.gov.sg/Corporate/Property/Property-Data/Private-Residential-Properties https://www.ura.gov.sg/Corporate/Property/Property-Data/Priv...