NBER paper points iPhone at birth-rate decline, skeptics push back

iPhone linked – A new National Bureau of Economic Research working paper frames the iPhone as a possible factor behind the post-2007 decline in US birth rates, pointing to reduced in-person interaction and increased pornography use. But the paper’s own timeline, the recession

The US birth rate has been sliding for years, and a new working paper from the National Bureau of Economic Research has decided to chase the timing—straight to the iPhone.

Since 2007, the annual birth rate in the United States has fallen by 22%. The question the paper throws onto the table is blunt: “Is the iPhone Birth Control?” Its abstract claims that national-survey evidence on time use and sexual behavior is consistent with the iPhone “reducing in-person interactions. increasing pornography use. and reducing sexual frequency.”.

But when a headline reads like a trap. readers tend to look for the escape hatch—and the paper provides one in its introduction. It quietly shifts from iPhones as the villain to something broader: email, the iPhone, and social media. The story then leans harder into a familiar timeline argument. The paper says US birth rate levels were “pretty much consistent from 1980 to 2007. ” and that 2007—when the iPhone was first launched—marks the change.

That is the kind of sequence that can feel persuasive until you remember what follows in the real world: post hoc ergo propter hoc. Just because something happens after something else doesn’t mean it caused the other thing. The paper’s own discussion also admits a bigger shadow behind the break in the birth rate: “the timing of the break aligned squarely with the onset of the recession.”.

The recession timing matters because the paper argues that today is “almost two decades on” from that downturn. implying the country should have recovered by now. Yet the rate has not bounced back—and. as the paper’s critics note through the broader facts of the moment. neither has the US middle- and lower-class economy. Those competing explanations sit side by side without ever fully resolving the central tension: whether smartphones are driving the change or simply sharing the stage with economic strain.

To tighten the link, the authors examine data from around 2005 to 2011, ending in 2011 for a specific reason. That is when the iPhone ceased being an AT&T exclusive. making it “easier to determine the population that had iPhones and the population that did not.” It’s a narrow window. built for comparability—yet the paper then tries to connect that period to later evidence about other influences.

That later material includes a National Center for Health Statistics report from 2024 about sex without contraception, even though the charts shown go only up to 2018. Other 2024 reports are also used, covering psychological distress, pornography search interest, and X-rated movie viewing.

The problem for supporters of the headline claim is that the paper’s porn-related charts don’t behave like a permanent iPhone-driven surge. Searches for pornography were described as massively increased in 2014 and by 2024 were roughly back to where they were when the iPhone launched. The working paper treats those shifts as part of its broader story. even as the pattern undercuts the simplest “iPhone caused ongoing decline” reading.

After 35 pages of blaming the iPhone for everything, the paper steps back from the most definitive framing. It explicitly denies being out for a single-cause explanation. saying: “We do not claim that the iPhone is the sole cause of the post-2007 decline.” Still. it follows with the line that keeps the controversy alive: “But over the 2008-2011 window… our estimates imply that the introduction of the modern smartphone played a sizeable role in the decline in US births.”.

In other words, the claim evolves. It begins like “the iPhone destroyed the US birth rate,” then admits it isn’t the only cause, and ultimately suggests smartphones in general may be part of the explanation.

There is, of course, also real-world data that doesn’t neatly point toward fewer family decisions. By the time the iPhone ownership window ends in 2011, jobs for midwives and related occupations are reportedly rising much faster than the average, according to the US Bureau of Labor Statistics.

And the iPhone itself has followed a different arc than the most literal interpretation of the paper’s headline. In 2011, Apple was estimated to have sold around 200 million iPhones. By 2021, it had sold 2 billion. If the question mark in “Is the iPhone Birth Control?” were treated as a direct answer. anyone aged 19 or younger would effectively be a statistical outlier—an idea the paper’s critics say the evidence does not support.

Even Jony Ive—who once expressed regret for unforeseen iPhone consequences—was pointing to unintended effects on the environment and on people’s attention. not on US birth rates. The new working paper may be asking a provocative question. but its limited examination period. the recession’s timing. and the mismatched patterns in later evidence keep the real answer from feeling settled.

iPhone US birth rate decline National Bureau of Economic Research smartphones and sex behavior pornography use recession timing correlation vs causation Apple iPhone sales