For your research question on the social benefits and liabilities for tribes developing casinos on Indian reservations, the more suitable source would be:
a peer-reviewed article published in UNLV Gaming Research & Review.
Peer-reviewed articles typically provide more reliable and well-researched information, as they undergo a rigorous evaluation process by experts in the field before publication. This is especially important for a research topic that requires credible and statistical analysis of the social impacts of casino development. While pechanga.net might provide some news or information, it may not have the academic rigor and reliability that a peer-reviewed article would offer.