Straw purchases are way more common than you are led to believe.
https://www.sciencedaily.com/releases/2015/09/150916162916.htm
And yes, some straw purchasers are caught, mainly the ones that make it their business. But the career purchasers aren't the majority.
I'm going to go out on a *very* short limb and guess that site, and the study published, are bought & paid for by anti-gun charties/think-tanks like so many other scientific research outlets & news aggregators. No, I'm not anti-intellectual, but I am also not blind to the rampant politicization in academia, particularly when it comes to politically controversial issues like gun control.
ETA: Whaddaya know...
"
Philip J. Cook, a professor of public policy, economics and sociology at Duke's Sanford School of Public Policy."
Five-second Google search:
-"The Gun Debate: What Everyone Needs to Know" --multiple Amazon reviews document systematic bias in his 'research' approach & findings
-"Gun Violence: The Real Costs" --even more critical reviews citing bias, even from anti-gun readers seeking validation
-"Underground Gun Markets" --an article about the exact thing he refutes in this later study
-"The Healthcare Costs of Gun Violence in Nevada" --this one showed up in a Bloomberg research catalog
-Multiple regular appearances in the Bloomberg/Soros backed 'news' outlets rife with biased anti-gun sentiment like The Trace, Media Matters, and so on
My "research" strongly suggests he's a highly biased and flawed researcher, if not an outright propaganda organ of the anti-gun set.
Besides, that study mainly shows that gun shows & private sellers are not the source of these weapons, but *family & acquaintances,* which is to say people who are probably aware of the legalities and choose to risk evading them regardless. Odd they don't spin the story as such a contradiction to their beloved 'gunshow loophole' though. A man who knows his ex-con brother hangs with dangerous thugs & wants him to have protection won't care about a BGC when it comes to giving him the means to self defense (yes, I'm also one of those guys who things disqualification itself is highly immoral). All your law accomplishes is adding the ability to prosecute the first guy for his brother's possession or a violent crime he did not commit or have any *hand* in. That in turn does nothing but further diminish the justification for law itself that is based in a harmful crime receiving suitable punishment.
TCB