Hahah, was wondering the same thing! There is a flaw in the model here or WSJ is somehow misintepreting what the research means.
“There is a flaw in the model here or WSJ is somehow misintepreting what the research means.”
I don’t think there is a flaw as I have seen similar data before. If this is wrong, someone should be able to provide corrected data, and I’ve not seen it. So, take a good look at that graph. It’s real and it’s telling you something.
You might also want to take a look at posts 33 and 76, and maybe reread the article.