alt Hacker NewsAccording to algolia, there were 57 posts with jane street somewhere in the title or url in the last year, so a bit more than one per week. For a Poisson distribution with rate = 57/52, P(X >= 4) ~= 2.5%. So there should on average be ~5 weeks with 4 or more jane street related posts at that rate.
Probably just random fluctuation.
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I appreciate a data-focused response here! What I'm more curious about is how many of these reached the front page. My impression is that the rate of how often they reach the front page is probably a good amount lower than once a week, which I think makes the question of whether this is a coincidence or not more reasonable.
Except I'm pretty sure there are three from the last 24 hours. Two live on the front page right now and one about some almost flooding just dropped off.
This is the kind of pedantry I come into HN for. Poisson is such an under-utilized distribution for these kinds of phenomena.