No, that's the thing. You, like many scientific materialists are asking for some study that shows you causality. The requirements of an IRB make it such that you most likely couldn't study this, and if you can, the timeliness of the study would lag 5-10 years behind usefulness.

You only have to walk around Koreatown now to see this. The people who make the policy that govern lives are not waiting around for the IRP to approve the study. I suggest you attempt to experience the life, or talk to those who have, while waiting for links to studies that prescribe outcomes related to current events.