> Similarly, we need to consider any one-time confounding events in control cities. Most notably, Minneapolis would be a natural control for St. Paul. However, in addition to the ballot measure on rent control, Minneapolis’s ballot also included referenda on mayoral power and policing. These confounding events mean that if property values in St. Paul changed relative to Minneapolis, we could not attribute the change to rent control.
their mistake is that they excluded Minneapolis for a bullshit reason here. you might as well do the analysis and then tell us. of course, they did, and found all the same effects as st. paul despite no rent control, so they chose not to talk about it.