Slide 34 and 35 in Lecture 18 (Missing data) are cyclic graphs

[djinnome]

I think it was an oversight, but on slides 34 and 35 in Lecture 18, there is an edge from $G^\ast\rightarrow M_g$. This has two problems:

1. If the missingness mechanism is due to the fact that the species $G$ is less studied, then there should be an arrow from $G\rightarrow M_g$ instead of $G^\ast\rightarrow M_g$.
2. The arrow from $G^\ast\rightarrow M_g$ and from $M_g\rightarrow G^\ast$ results in a cyclic graph, which breaks everything.

Hopefully, you can correct the slides and the video without having to change everything. I don't have access to the 2nd edition of the textbook, but I wonder if there is also an error in there.