# System is systematically changing URLs in many of my posts

Many of my posts which have links to blog articles such as https://fharrell.com/post/po are having the URLs systematically changed to http://www.fharrell.com/p/blog-page.html which is not even a valid page. Help appreciated!

• I am trying to reproduce this behavior, but to no avail. I was able to fix the bad link at stats.stackexchange.com/a/571910/919. Could you provide a little more detail about how these links are being changed? What exactly is happening?
– whuber Mod
Apr 17 at 19:01
• Regular links like hbiostat.org/rms or fharrell.com/post... are being changed to fharrell.com/p/blog-page.html and I'm fairly certain there was nothing I did to make that happen. That's because my google analytics don't show hits on /p/blog-page.html until very recently. Apr 17 at 19:52
• I get that, but what do you actually observe? For instance, does the change happen when you post something, or does it occur quietly over time to existing posts? Does it happen right when you type or paste a link into a post?
– whuber Mod
Apr 17 at 20:43
• IIRC any kind of automated link correction subsequent to posting ought to show up in the post history as an edit by the 'Community' user, & I haven't found any of those. Apr 18 at 8:12
• Sorry @whuber - the change is made weeks after the post was made in some cases without me editing the post. Apr 18 at 11:10
• I notice all the ones that remain were posted in 2017. This makes me wonder whether something happened in that year alone that you have just discovered. Are you aware of any other flawed URLs besides those?
– whuber Mod
Apr 18 at 13:44
• I don't know of any other flawed URLs. The first attempted access to blog-page.html was Jan. 8, 2018. If the number of replaced URLs doesn't grow I can go back and edit the 8 or so occurrences. Apr 18 at 14:33

### Web archive

These links seem to have been in place at least since October 2020, at least one and a half year ago.

We can see this in the following archived webpage which contains the link http://www.fharrell.com/p/blog-page.html

https://web.archive.org/web/20201020171335/https://stats.stackexchange.com/questions/266670/how-often-should-a-statistical-model-lets-say-logistic-regression-be-evaluated

### Stackexchange dump

It is possible to dig further by using the database dump from stack exchange.

It seems very unlikely that the system can change the body text without leaving a trace in the post history. That history can already be viewed via the website and there is no trace in the history like user 'community' editing some link or style.

Anyway, if there would be such a change that did not show up in the post history then it should be still possible to see it in the database dumps. Because I have currently no access to my laptop, I can not perform that search.

### Potential explanation

The web address ending with /p/blog-page.html is not so strange. It might stem from the blogspot webpage: https://feharrell.blogspot.com/p/blog-page.html

It could be possible that you wrongly combined two url's. This might explain why, as Whuber mentioned in the comments, only posts from 2017 have the error.

### Other occurances (and potential explanation 2)

Analysis of variance for binary data

Some intuitive and simple approaches are discussed in BBR Chapter 16 - see link at fharrell.com/p/blog-page.html

Clinical trialists: please quit computing change from baseline. See BBR Chapter 14: http://fharrell.com/p/blog-page.html

And yes indeed, the page https://www.fharrell.com/p/blog-page.html used to exist back in 2017. Or at least, the internet archive seems to agree with me. This page can be found in the archives