Is There a Pattern of Diff?

M and LFA is an automated package that makes this process a little bit easier to do as an applied person. It still involves lots and lots of these likelihood ratio tests. But we know from research looking at similar methods that that is prone to errors, because when we test for the first item with diff, we're not including the diff for the other items. And so more recently, I've been working on developing ways of fitting the model in a way where you can identify those patterns of diff without having to do this sequential testing using regularization.