[burger]

Apologies if this is a dumb question but I'm going to ask it anyway. I'm not keeping up with the conversation here as I haven't touched any of this since my undergrad days. But when you say curve-fitting do you mean just trying to find some sort of function that can be applied to the data to help explain the growth?

Yes.  The problem is that the data are the deaths so far, which are still growing quickly in most states.  But there is little to no support for the bell-shaped curves they're using.  It's possible that things will reach a peak and then slow down nicely, but there are still a lot of ways this could play out.  Models like this one give false confidence that things are trending in the right direction when, so far at least, there is little to be optimistic about (outside of Washington maybe).  That may change in the next couple of weeks in a lot of states as lockdowns start to reduce the death rates.  But we have to wait and see.

[burger]

Apologies if this is a dumb question but I'm going to ask it anyway. I'm not keeping up with the conversation here as I haven't touched any of this since my undergrad days. But when you say curve-fitting do you mean just trying to find some sort of function that can be applied to the data to help explain the growth?

Yes.  The problem is that the data are the deaths so far, which are still growing quickly in most states.  But there is little to no support for the bell-shaped curves they're using.  It's possible that things will reach a peak and then slow down nicely, but there are still a lot of ways this could play out.  Models like this one give false confidence that things are trending in the right direction when, so far at least, there is little to be optimistic about (outside of Washington maybe).  That may change in the next couple of weeks in a lot of states as lockdowns start to reduce the death rates.  But we have to wait and see.