I remember a number of years ago when Stereophile reviewed a Velodyne speaker. It wasn't a very good review. In the Manufacturer's Comments at the end of the issue, Velodyne made their displeasure known. They further said they would stop advertising in Stereophile for the forseeable future. This was about eight or ten years ago. I haven't noticed whether they are still holding the grudge and continue to avoid advertising there.
So there is no question that reviews and ads are correlated. However, this documented correlation is in the opposite direction to what was proposed in the thread question.
I do not have any evidence that the correlation works in the direction of an ad leading to a review. I have certainly noticed ads from certain companies appearing in magazines around the time of a review, and then tapering off a few months later. However, this is not conclusive proof that the ad lead to the review. It is equally plausible that the manufacturer is simply trying to leverage the increased awareness of their product that the review produces.
So there is no question that reviews and ads are correlated. However, this documented correlation is in the opposite direction to what was proposed in the thread question.
I do not have any evidence that the correlation works in the direction of an ad leading to a review. I have certainly noticed ads from certain companies appearing in magazines around the time of a review, and then tapering off a few months later. However, this is not conclusive proof that the ad lead to the review. It is equally plausible that the manufacturer is simply trying to leverage the increased awareness of their product that the review produces.