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Price fixing
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=== 1990s airlines === Airlines in the 1990's were blocked by the [[United States Department of Justice|US Department of Justice]] from continuing to use software to share data on routes and prices before they became public.<ref name=":1">{{Cite web |last1=Vogell |first1=Heather |last2=Coryne |first2=Haru |last3=Little |first3=Ryan |date=2022-10-15 |title=Rent Going Up? One Company's Algorithm Could Be Why. |url=https://www.propublica.org/article/yieldstar-rent-increase-realpage-rent |access-date=2024-08-21 |website=ProPublica |language=en}}</ref>
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