[throwaway167]

I was disappointed that the author hadn't done a literature review, even a basic one. Perhaps they're an expert and didn't see the need, but they didn't cite anything or provide any further reading.

And it's not like this subject isn't researched.

There's so much [1] [2] that a literature review might be a really good place to start.

[1] https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=birt...

[2] https://ideas.repec.org/cgi-bin/htsearch?form=extended&wm=wr...

A further article, without using data to demonstrate normative hypotheses but also with visualisations, is this: [3]

https://ourworldindata.org/fertility-rate?source=content_typ...