Can you clarify - do you mean that the types of drugs used to treat ADHD make US tech workers more productive, or do you mean that it they increase the use of SV-style tech products? Somewhat contentious take either way.
Looking at the rates of ADHD diagnosis worldwide, it is clear that someone is getting it wrong - but that brings us to the deeper discussion of how far capitalism should be allowed to dominate; i.e. whether having large numbers of drugged-up but productive citizens is actually an OK situation for a country to be in.
I've heard about it, but it seemed more anecdotal, and it's not uncommon for drug users to rationalize their consumption in some way, eg based on their first experience.
U.S. Air Force, being tasked with a somewhat similar job, came to similar conclusions: https://pubmed.ncbi.nlm.nih.gov/7661838/
I don't have a study, but the answer is yes, it definitely can boost productivity. But overall, a huge number of people take it for the high.
It's a sad state of affairs because people genuinely suffer for it and we don't have the foggiest what's going on, despite ever ramping research funding. Curing it could bring back billions to the economy.
It was first described (written down) in the late 1700s. Medicine is using very blunt tools (amphetamines, ect) out of necessity to treat problems which need far better understanding.
We really need better, cheaper and more accessible medical tech. A non-theranos, steve jobs style medical tech revolution would do a lot of good for a lot of people and put cured patients to useful work, who would otherwise suffer.
Isn't the usual answer something like:
"People with ADHD-like characteristics are restless and impulsive, therefore more likely to decide to strike out on big new adventures. Like emigrating to an exciting new country. So the U.S. has been an ADHD magnet since before its founding, leading to a much higher prevalence / diagnosis than most other parts of the world. And since ADHD is hereditary, it gets passed down the generations, sustaining the imbalance with the rest of the world. And/or maybe there is an amplification effect where in most populations the ADHD genes stay diluted in the gene pool, since it is not a common occurrence, and people with ADHD generally had kids with non-ADHD people. But at certain base rates, the ADHD people start having children with each other, intensify the effects."