(about 30% of the city's rental housing stock at the time).In 2017, Stanford economics researcher Rebecca Diamond and others published a study which examined the effects of this specific rent control law on the rental units newly controlled compared to similar style units (multi-unit apartments with four or less units) not under rent control (built after 1980), as well as this law's effect on the total city rental stock, and on overall rent prices in the city, covering the years from 1995 to 2012.