BenjaminTodd

They look at people who switch into entrepreneurship, and then consider the whole sample, so I don't think survivorship bias is a big issue.

I agree it would be good to go more fine grained in the categories though.

Yes - they try to address that in the paper, but it's hard.

We totally agree - we go into that in the post e.g. see the conclusion section.

We discuss this somewhat in the post - the line at which you say something "works" is arbitrary. We explore how the choice of definition changes the stat.

Some of it is that, but much less so for the meta-analyses. We have a bunch more comments about this in the doc.