I realize there are many variables that are not included in this article. They have not been "disregarded" because they were not "regarded." This article is a summary of an attempt by researchers to quantify racism given that even racists sometimes deny its existence. I think it would be good if, instead of sniping at the article, you would write a comment that includes some of the variables that are making your head spin. I think it is always good to be helpful rather than just complain. And if I read your work and have any issues with it, I will also try to be helpful rather than complaining.