In one study researchers found that significantly more mosquitoes landed on study participants after drinking a 12-ounce beer than before.
I am on blood thinners, so I can't drink, but perhaps we can get a few volunteers. Roll them in catnip and hand them a few beers.
Personally a few of these studies are pure bunk. A few years ago they claimed the same thing about lemon eucalyptus oil and wife bought a bunch of it. It didn't work worth a hoot, but DEET continues to work for me. I buy it off season in high concentration formulas and use it sparingly.