Has anyone noticed that the ACS estimates for 2017 by the census on American Fact Finder have changed without any explanation as to why they were changed and what caused the change? I doubt that they would have released the revised 2017 estimates earlier than the current release schedule (which are usually released in tandem with the new yearly estimates, in this case the estimate for July 1, 2018 should be released some time in April:
https://www.census.gov/programs-surveys/popest/about/schedule.html
Austin's city population is now listed as 916,906.
https://factfinder.census.gov/faces/nav/jsf/pages/community_facts.xhtml
Travis county is now listed as 1,176,584 rather than 1,226,698. Bastrop, Caldwell, and Hays are also at new lower estimates, etc.
With the revised (and of unknown origin) estimates, the Austin metropolitan area went from 2,115,827 down to 2,000,590.
The same happened to San Antonio, Houston, Dallas, and almost everywhere in Texas.
In the MSA counties of the Central Texas I-35 corridor from the Waco MSA to San Antonio MSA, these are the changes:
#1 - Name
#2 - 2010 Census
#3 - 2017 (new, currently appearing on Fact Finder)
#4 - 2017 (old, still on Wikipedia, but validity checked from my own copies of previous downloads of the dataset from American Fact Finder)
#5 - % growth from 2010 (new numbers)
#6 - % growth from 2010 (old numbers)
#7 - # diff (new-old)
#8 - % diff. ((new-old)/old)*100
Just FYI: the suburbs rows are all MSA counties' sum population minus the MSA anchor city's population.
Bastrop 74171 80306 84761 8.271426838 14.27781748 -4455 -5.255954979
Caldwell 38066 40544 42338 6.50974623 11.22261336 -1794 -4.237328169
Hays 157107 194843 214485 24.01929895 36.52160629 -19642 -9.157749959
Travis 1024266 1176584 1226698 14.87094173 19.76361609 -50114 -4.085276083
Williamson 422679 508313 547545 20.25981892 29.541567 -39232 -7.16507319
Austin 790390 916906 950715 16.00678146 20.28429003 -33809 -3.556165623
Austin Suburbs 925899 1083684 1165112 17.04127556 25.8357553 -81428 -6.988856007
Austin MSA 1716289 2000590 2115827 16.56486757 23.27917967 -115237 -5.446428276
Atascosa 44911 48139 48981 7.187548707 9.062367794 -842 -1.719033911
Bandera 20485 21316 22351 4.0566268 9.109104223 -1035 -4.630665295
Bexar 1714773 1892004 1958578 10.33553712 14.21791689 -66574 -3.399098734
Comal 108472 129100 141009 19.01688915 29.99575927 -11909 -8.445560212
Guadalupe 131533 150889 159,659 14.71569872 21.38322702 -8770 -5.492956864
Kendall 33410 40306 44026 20.64052679 31.77491769 -3720 -8.449552537
Medina 46006 48548 50006 5.525366257 8.694518106 -1458 -2.915650122
Wilson 42918 47205 49304 9.988815881 14.87953772 -2099 -4.257261074
San Antonio 1327407 1461623 1511946 10.1111415 13.90221688 -50323 -3.328359611
San Antonio Suburbs 815101 915884 961968 12.36447998 18.01825786 -46084 -4.790595945
San Antonio MSA 2142508 2377507 2473914 10.96840712 15.46813361 -96407 -3.896942254
Bell 310235 336506 340411 8.468096765 9.726819991 -3905 -1.147142719
Coryell 75388 75818 74686 0.570382554 -0.931182682 1132 1.515678976
Lampasas 19677 20473 20760 4.045332114 5.503887788 -287 -1.382466281
Killeen/Temple/Belton 405300 432797 435857 6.784357266 7.539353565 -3060 -0.702065127
McLennan 234906 245720 247934 4.603543545 5.546048207 -2214 -0.892979583
Falls 17866 17289 17273 -3.229598119 -3.3191537 16 0.092630116
Waco MSA 252772 263009 265207 4.049894767 4.919453104 -2198 -0.82878657
The changes seem to be random and don't seem to correspond at all to any variables I can think of that might have affected the validity of the old estimates and I can't see any particular political pattern either (I.E. is the Trump administration screwing with the numbers for political purposes? It doesn't seem like it to me). These also don't seem like the typical ACS estimates revisions. The % change is MUCH larger than is typical from the original estimate to the revised estimate for pretty much every jurisdiction I've checked, so I think we can definitely rule out that they've released the revised numbers uncharacteristically earlier than the subsequent years' estimates release and infer that something systematic is occurring on the ACS website.
In sum: WTF is going on?