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Re:Yelp Claims Google Broke Promise Made to Regulators by eregorn on Tuesday September 12, 2017 @08:53AM (#15226850)
Seems that they attempted to, but they can't definitively disprove it.

Basically, they couldn't find evidence, but they can't disprove the hypothesis and they can only tell from the year 2012. Thus, they can't see if stores let their advertising expire before that year or see the reviews stores had before advertising if they started before that.

Re:Yelp Claims Google Broke Promise Made to Regulators by linkregister on Wednesday September 13, 2017 @04:45PM (#15242453)
Yes, all scientific studies have limits to their scope. That is tautological.