Home of rivalry research on the web. Data from over 10,000 fans. Use for research, business, fun, and curiousity. Data are free for use by others with attribution under the Creative Commons Attribution-ShareAlike license (CC BY-SA). This website and the research data displayed are not endorsed by or affiliated with any league or team. The faculty researchers are employees of their respective institutions and receive university support for their research. The research is subject to UMass IRB protocol #2410.