Is There a Causal Relation Between Mariwana and Higher Earnings?

I have a question about that kind of finding, which argues that the people who use mariwana more in high school have lower annual earnings later. It's very challenging to hold all else equal between those individuals who would use early and later. If we were to legalize, if wou look at public support, it has been trending upwards overtime. And i think this is a different period than it was when the wrangel study came out.