Why is this controversial? Such a bias will almost always exist. There is an anecdote from Hamming's famous "You and your research" [0] talk which I'll reproduce in full:<p>> Another personality defect is ego assertion and I'll speak in this case of my own experience. I came from Los Alamos and in the early days I was using a machine in New York at 590 Madison Avenue where we merely rented time. I was still dressing in western clothes, big slash pockets, a bolo and all those things. I vaguely noticed that I was not getting as good service as other people. So I set out to measure. You came in and you waited for your turn; I felt I was not getting a fair deal. I said to myself, ``Why? No Vice President at IBM said, `Give Hamming a bad time'. It is the secretaries at the bottom who are doing this. When a slot appears, they'll rush to find someone to slip in, but they go out and find somebody else. Now, why? I haven't mistreated them.'' Answer, I wasn't dressing the way they felt somebody in that situation should. It came down to just that - I wasn't dressing properly. I had to make the decision - was I going to assert my ego and dress the way I wanted to and have it steadily drain my effort from my professional life, or was I going to appear to conform better? I decided I would make an effort to appear to conform properly. The moment I did, I got much better service. And now, as an old colorful character, I get better service than other people.<p>Anecdotally, I've been on the job search train recently. Even though recruiters say that dress code is "casual", what I've found is that if I take some time to wear fitting clothes and make sure that my video background is either blurred out or nicer looking, the results are very different.<p>[0]: <a href="https://www.cs.virginia.edu/~robins/YouAndYourResearch.html" rel="nofollow">https://www.cs.virginia.edu/~robins/YouAndYourResearch.html</a>