observational study, not experimental
I remember one scientist who pointed out that observational studies were one of the weakest forms of evidence possible. This type of study can detect things like “smoking is bad for you”, because smokers are 30 times more likely to die of lung cancer. But once you get down to smaller effect sizes, you run into the problem that observational studies hopelessly mix up different correlated variables. So for many things, observational studies essentially return random noise. This is allegedly what happened with HRT for post-menopausal women, where the observational studies failed to note that the people taking HRT contained a much larger proportion of nurses and other people who complied with medical advice. And then there’s nutrition, where every study feels like it gets reversed every 5 years.
Or the way that Vitamin D levels are apparently correlated with almost every measure of good health, but Vitamin D supplementation notoriously fails to actually improve any of those measures.
“2x” is a big enough effect size that this may actually be real, and not a spurious correlation. And of course, there’s the underlying history of other sleep medications apparently being cursed to have horrible side effects, so “melatonin is actually terrible for you” wouldn’t be surprising.
(Since we are speaking of observational studies, I suspect that at least two of the things I have claimed in this post are Officially Wrong. Which two things are officially wrong may depend on what year you read it.)
(This is mostly a tangent, but it talks about how to mess with signalling if you’re already outside of the system.)
Back when I was consulting, I actually figured out how to get away with wearing a suit as a programmer. I had some help from this from a helpful older salesguy in a suit shop, who was probably well past retirement age. He explained that suits could actually convey a wide range of signals, including:
“Small town banker.” This suit only changes on a generational time scale.
“Ad guy.”
“Trendy artist.” This changes much more rapidly, and a specific style can go out of fashion.
There are lots of visual details here: How many buttons you have, the style of the pockets, the collar, the color, etc. For a really ancient example, look at how Will Smith changes the classic Men in Black outfit at the end of the first movie. For a more recent example, Expedition 33 has tons of fantastic retro suits.
So if you want to wear a suit as a programmer, start by looking at whatever trendy artists are wearing when they’re forced to wear suits, and then try to work out a personal style from there. Depending on the context (employee, conference speaker, consultant), you might want some combination of:
Good looking. Suits were popular for ages because they can actually make a wide range of male body types [[1]] look good. This requires a good fit and possibly some tailoring.
Comfortable. Well-fit suits can actually be a lot more comfortable than you’d think; I was actually surprised by this. Looking comfortable is actually a plus, because you stop signalling “I am making myself uncomfortable in order to submit to social convention.”
Slightly eccentric, or at least individual. I agree that programmers should almost never signal “boring conformist” in interviews, because it makes the hiring managers suspect that you’re desperate. But that just rules out boring banker suits, and ill-fitting suits.
Expensive and successful. Particularly if you’re consulting, you want to look like someone who gets paid your daily rate.
There’s a lot of space here, and it will vary by city and context. San Francisco is an unusually hard place to carry off a suit. So’s New York City, but in the opposite direction, because there are so many $3,000+ suits and people who have very strong opinions on suit fashion. Do not try to compete directly.
But the underlying signal that programmers often want to send in interviews is “My skills are valuable and rare enough that nobody would ever ask me to dress up like a small town banker.” And there are definitely ways to wear a suit with flair and non-conformity. Unfortunately, like a lot of signalling, it may require more skill, expense and risk of looking foolish.
Also, I think a few more people should dress up like Expedition 33 characters. Just saying.
Suits also look fantastic on women and non-binary people, but that’s separate discussion that I know much less about. As an apology, please have this photo of Mason Alexander Park.