We are currently doing what could be the closest we can get to an RCT of restrictions and mandates: North vs. South Dakota. Two very similar states, but as of last Friday, very different policies in how they approach COVID. (1/x)
On Friday, ND imposed restrictions on bars and indoor dining, indoor events, and sports. They also mandated masks. Meanwhile, SD is not changing their approach and avoiding such restrictions. Here is a look at their cases so far (source for data is CTP): (2/x)
Their curves are very similar, so they are starting from the same place. We will soon know if they diverge as a result of ND's interventions. However, it is important to note that they are on slightly different latitudes, so there is that. Here is hospitalizations: (3/x)