As I was researching information on topic X, I found a paper published by a Think Tank. Interesting enough, said paper supports the policy pushed by the Think Tank. So far, all sources used in my paper are from researchers at a University, and I was wondering if I should include the paper in my lit review.
My question is whether I should include the paper or just ignore it, seeing as how the publisher holds a strong bias (possible conflict of interest). With that said, I'm also curious whether it's normal to cite research put out from a Think Tank.