This video does a fair job of explaining what's going on: https://www.youtube.com/watch?v=E3i_XHlVCeU https://www.youtube.com/watch?v=E3i_XHlVCeU It does say

This video does a fair job of explaining what's going on: https://www.youtube.com/watch?v=E3i_XHlVCeU https://www.youtube.com/watch?v=E3i_XHlVCeU It does say "it's complicated" and "there's a lot going on" but it does show the interaction between several factors.