There are selection effects, for sure. The process wasn’t as bad as you describe, but it was pretty bad as I describe in the post. I made the list of names (before looking up what they had written etc). I also actively looked for counterexamples to add to the list later. So the number 2⁄3′s homeschooled for example is just the number I got going through everyone. About a third did go to schools, Jesuit schools being most common—for my sample. The post itself uses a lot of colorful examples, because, that’s pretty much what I’m doing. Getting an impression.
There are selection effects, for sure. The process wasn’t as bad as you describe, but it was pretty bad as I describe in the post. I made the list of names (before looking up what they had written etc). I also actively looked for counterexamples to add to the list later. So the number 2⁄3′s homeschooled for example is just the number I got going through everyone. About a third did go to schools, Jesuit schools being most common—for my sample. The post itself uses a lot of colorful examples, because, that’s pretty much what I’m doing. Getting an impression.