Tell the Harvard professors to walk into 2,000 McDonalds and order a happy meal and take a survey and complete case study on how many clerks suggest Burger King before they suggest a number 3 value meal.
Now, if Google wanted to be firm, and maybe this does exist, not sure, but when the only privileged results in a search should come from companies who pay for it, and if they do pay for it, Google should have a special surcharge from companies wishing to appear above Google services in that specific search.
Google doesn't cheat, it does what most businesses try and accomplish, a way to run your customers back into your cycle. - GTV