1. Anderson , N. D. Douglas-Gabriel 2016 Washington Post https://www.washingtonpost.com/local/education/nations-prominent-public-universities-are-shifting-to-out-of-state-students/2016/01/30/07575790-beaf-11e5-bcda-62a36b394160_story.html?tid=a_inl
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3. Nearly-efficient Tuitions and Subsidies in American Public Higher Education;Burer;Economics of Education Review,2016
4. Carlson , J. C 2016 Iowa City Press Citizen http://www.press-citizen.com/story/news/education/college/2016/06/13/ui-tuition-proposal-could-put-students-disadvantage-expert-says/85712716/
5. College Board 2015 http://trends.collegeboard.org/home