Why economists believe 47.2 is our most miserable age

Here's a version with a less-restrictive paywall -- from January:

https://www.bloomberg.com/news/articles/2020-01-13/middle-ag...

Which seems to be based on this 2017 article:

https://voxeu.org/article/midlife-low-human-beings

Though I think the real point of this article is that the economists find a midlife dip and psychologists don't, as in this paper from March:

https://www.researchgate.net/profile/Carol_Graham/publicatio...