I don’t think there is a source. I found this which links back to itself as a source. https://counter-currents.com/2018/03/the-war-against-whites-in-advertising/
Realistically, no study with those findings would ever be published and no researcher would destroy their career even trying to get something like that published. It’s very unlikely we will find any peer reviewed study that doesn’t find diversity enriches us all deeply.
There's an old link on the sidebar of this sub.
Black males abandon White females they impregnate at a rate of 92% - Hispanics do not marry the women they impregnate
(post is archived)