Any residents in the Chicago-area purchased milk from Dominick's Finer Foods or Jewel food stores between 23 August 1996, and 23 August 2000 can join a price-fixing lawsuit against the grocery chains, according to a ruling by a Cook County judge. Oak Brook-based Dominick's, a subsidiary of Safeway Inc, and Albertson's Jewel deny that they illegally conspired to fix milk prices about US$1 higher than in other parts of the US. They have stated that the case should not be heard in court.