In the last couple of months Stack Exchange has undertaken significant effort to make the network more welcoming. From a regular user's perspective, we can only see the internal consequences and ripple effects this has had.
I was re-reading Tim Post's Answer about the science behind what led to determining the necessity of the welcoming push.
In this post it is mentioned that Stack Exchange now employs highly skilled data scientists that seem to have a finger on the pulse of whether or not the efforts are paying off.
I'd be interested if the trend and numbers on this have seen a significant change with the welcoming push and in which direction. Has the initiative worked so far? How is Stack Exchange measuring this? Are there any particular areas that yet need more work?