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fertility

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What really predicts fertility? A principled look at country time series data

  • Post author:Emil O. W. Kirkegaard
  • Post published:12. April 2026
  • Post category:Demographics

We have an endless amount of articles trying to show that this or that variable is a plausible causal candidate, and hopefully something we can do something about practically speaking.…

Continue ReadingWhat really predicts fertility? A principled look at country time series data
Read more about the article Explaining Poland’s fertility paradox

Explaining Poland’s fertility paradox

  • Post author:Emil O. W. Kirkegaard
  • Post published:3. April 2026
  • Post category:Demographics

You have probably seen this map: It regularly goes viral on X with the usual abortion debate to follow. The source is this site, where we can also learn that this…

Continue ReadingExplaining Poland’s fertility paradox
Read more about the article Dysgenics for whom?

Dysgenics for whom?

  • Post author:Emil O. W. Kirkegaard
  • Post published:27. March 2026
  • Post category:Demographics/Genetics / behavioral genetics/intelligence / IQ / cognitive ability/Psychiatry

Some time ago, we published studies showing that the negative correlation between intelligence and fertility varies by other factors. Specifically, we found that it varies by religiousness and conservatism, in…

Continue ReadingDysgenics for whom?
Read more about the article Are dogs good or bad for fertility?

Are dogs good or bad for fertility?

  • Post author:Emil O. W. Kirkegaard
  • Post published:30. January 2026
  • Post category:Demographics

In August last year, I wrote a post about our then new study about people's pet preferences and various human differences: Prior research found that pet preferences and ownership relates…

Continue ReadingAre dogs good or bad for fertility?
Read more about the article Ask me questions 2 (paid subs)

Ask me questions 2 (paid subs)

  • Post author:Emil O. W. Kirkegaard
  • Post published:10. September 2025
  • Post category:Meta/Personal/Science

Back in February, I ran the first ask me questions post for paid subs. I guess it's time for another one. Hopefully, you guys have come up with some new…

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Read more about the article Babymaxxing

Babymaxxing

  • Post author:Emil O. W. Kirkegaard
  • Post published:18. August 2025
  • Post category:intelligence / IQ / cognitive ability/Medicine/Personal

And so the day came, August 12, our first child joined the world: Given how great early life interventions work, I started immediately with important topics like British history: Kidding…

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What doesn’t explain the post-COVID fertility decline?

  • Post author:Emil O. W. Kirkegaard
  • Post published:13. July 2025
  • Post category:Demographics/Medicine

I've been writing about fertility for a while. Of recent interest is the COVID or post-COVID fertility decline. Birth Gauge compiles the most up to date TFR (total fertility rate)…

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Read more about the article Can we boost fertility with paid leave?

Can we boost fertility with paid leave?

  • Post author:Emil O. W. Kirkegaard
  • Post published:18. April 2025
  • Post category:Demographics

In every country some women get pregnant and give birth from time to time, and there is some kind of social support system in place for taking care of the…

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Read more about the article Are babies in Denmark becoming relatively more Danish?

Are babies in Denmark becoming relatively more Danish?

  • Post author:Emil O. W. Kirkegaard
  • Post published:7. March 2025
  • Post category:Demographics

Over on Twitter we have this claim by Marko Jukic about the speed of the Danish population replacement is getting a lot of attention: It sounds unlikely given that migration…

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Read more about the article People did not used to marry early in the good old times

People did not used to marry early in the good old times

  • Post author:Emil O. W. Kirkegaard
  • Post published:28. February 2025
  • Post category:Demographics/Sociology

If you look at a plot of age of first marriage and age of first birth (usually following marriage), you might get the idea that the 1960s cultural revolution, feminism…

Continue ReadingPeople did not used to marry early in the good old times
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