It is "birth control" but in sort of opposite way. People are now much better informed, thanks to internet and devices like iphone. They do not have to relly on state education (that wants more babies) and popular shows like Friends.
State founded school is not going to tell you it costs $1200000 to raise baby, or you have 50% it will be taken away.
It will also push stats made in lab controlled conditions, and gloss over unreliability of such medications in real life (like if you would skip a pill for a few days).
Failure rate of birth control in normal life is around 10% per year (if you drink, forget to take pill at very exact time, use antibiotics). So there would be about chance 50% to get unwanted baby over years. Well informed person will not make such mistake.
I don’t want to be flippantly dismissive but surely there was a certain other event in 2008 that caused many families to reconsider the financial wisdom of starting a family.
Even if you control for age and wealth, the people who used iPhones in 2008, i.e. tech hipsters, are obviously different in tangible ways from the people who didn't use iPhones in 2008. It's not possible to prove causality from that.
Maybe some people realized that they could wait a few years and still have kids later, and others didn't think about having kids purely though the lens of evolutionary biology.
Before political correctness hit this area, doctors' observations led to classifying any first pregnancy past 25yo as geriatric. Healthcare progresses in some areas, some (like DS) are rigid to socially defined trends.
Study claims iPhone contributed to a significant decrease in the birth rate after its release in 2007, when AT&T was the only carrier for the phone, allowing researchers to “isolate an iPhone-specific channel” and compare birth rates in areas with a high AT&T customer base to competitors' areas:
“The diffusion of the iPhone explains 33-52 percent of the decline in the general fertility rate among women aged 15-44.”
Authors go on to muse that “as modern smartphones diffused, time spent with friends in person and sexual activity fell sharply alongside rising consumption of pornography, a possible substitute for partnered sex.”
Nothing to do, of course, with AT&T’s customer base at the time being urban, well-educated, and white, or that U.S. birth rate in the youngest groups had already been falling before 2007 with the trend continuing during study period.
The authors do address this issue, by reweighting their treatment and control counties on observable covariates. But I agree with you that this isn’t the causally watertight research design that economists usually strive for.
It might be worthwhile using local lightning strikes as an instrument for 3G coverage. Others have done this, but not for fertility afaik. But the lightning strike data costs about $1000.
There's a subgenre of dystopian sci-fi where the premise is that reality in general is destined to be eclipsed by matrix-like hyper-realities, and that people will vastly prefer those and cede reality to whoever's left.
I guess the way this could work itself out is that if you prefer a hyper-reality, your genes do not pass on, and someone else's do, and within some number of generations we bounce back in response to evolutionary pressure.
I learned a fun fact in a recent interview of David Reich (by Dwarkesh):
> Every mutation that can occur does occur. There are eight billion people in the world. There are maybe 30 new mutations every generation, so that’s 240 billion new point mutations every generation. There are only three billion DNA bases in the genome, so every mutation that can occur does occur about 100 times every generation. We’re not mutation-limited anymore.
What makes an iPhone better than Durex is that you can take it out of your pocket and everyone will envy you. In that sense, I think it's an envy-inducing contraceptive tool.
State founded school is not going to tell you it costs $1200000 to raise baby, or you have 50% it will be taken away.
It will also push stats made in lab controlled conditions, and gloss over unreliability of such medications in real life (like if you would skip a pill for a few days).
Failure rate of birth control in normal life is around 10% per year (if you drink, forget to take pill at very exact time, use antibiotics). So there would be about chance 50% to get unwanted baby over years. Well informed person will not make such mistake.
People prefer scrolling to sex enough that using the iPhone explains up to half of the U.S. birth decline since 2011.
Since people using other carriers also experienced 2008, it's not that.
Study claims iPhone contributed to a significant decrease in the birth rate after its release in 2007, when AT&T was the only carrier for the phone, allowing researchers to “isolate an iPhone-specific channel” and compare birth rates in areas with a high AT&T customer base to competitors' areas:
“The diffusion of the iPhone explains 33-52 percent of the decline in the general fertility rate among women aged 15-44.”
Authors go on to muse that “as modern smartphones diffused, time spent with friends in person and sexual activity fell sharply alongside rising consumption of pornography, a possible substitute for partnered sex.”
Nothing to do, of course, with AT&T’s customer base at the time being urban, well-educated, and white, or that U.S. birth rate in the youngest groups had already been falling before 2007 with the trend continuing during study period.
It might be worthwhile using local lightning strikes as an instrument for 3G coverage. Others have done this, but not for fertility afaik. But the lightning strike data costs about $1000.
On the other hand, as William James wrote, one of definite characteristics of a religious experience is seriousness. "All is not vanity."
I guess the way this could work itself out is that if you prefer a hyper-reality, your genes do not pass on, and someone else's do, and within some number of generations we bounce back in response to evolutionary pressure.
I learned a fun fact in a recent interview of David Reich (by Dwarkesh):
> Every mutation that can occur does occur. There are eight billion people in the world. There are maybe 30 new mutations every generation, so that’s 240 billion new point mutations every generation. There are only three billion DNA bases in the genome, so every mutation that can occur does occur about 100 times every generation. We’re not mutation-limited anymore.
https://www.dwarkesh.com/p/david-reich-2