Garbage in, garbage out. It's a shame that ACS numbers are totally unusable now.
What basis do you have for this assertion?
And tell me what your preferred alternative is?
My basis is that ACS numbers were dramatically off in 2020. Based on how much you post about this sort of thing there shouldn't be anything you don't know in this Twitter thread, but I found that it provided a good summary of the problem:
https://twitter.com/zoningwonk/status/1641503129815625729I do not have a preferred alternative because there does not appear at present to be a good way of estimating population. This does not mean that we should accept bad estimates.
ProgressiveModerate
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 | New estimate released: Detroit Population Down?
« Reply #4 on: January 28, 1954 at 08:02:30 »
Yeah, there's basically no way Detroit lost *that* many people, especially since the number of housing units has been increasing.
I think I read somewhere that for those Detroit nubmers to be true, there'd have to be a nearly 10% reduction in average Household size since 1950.
Why do demographers specifically seem to underestimate Detroit so much? Do apartment blocks and a lot of roommate situations make things more complicated?
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Yes, for this to be true it requires New York to be experiencing Detroit-level population decline. In addition to being very difficult to believe on its face, this simply does not cohere with empirically observed large rent increases in New York. By contrast, when New York's population did drop dramatically in 2020, rents declined dramatically also.
