iPhone Adoption Explains a Large Share of the U.S. Fertility Decline, Study Finds

A June 2026 National Bureau of Economic Research (NBER) study links the rapid diffusion of the iPhone to a substantial portion of the drop in U.S. fertility. Analyzing county-level data from June 2007 (iPhone launch) through February 2011 (first Verizon iPhone), the authors found that smartphone prevalence correlates with lower birth rates among women aged 15-44.

Are iPhones contributing to America’s falling birth rate?

From 2007-2011 AT&T was the exclusive carrier for the iPhone, giving the device a concentrated market presence. By 2023 the U.S. total fertility rate had fallen to 1.62 children per woman, well below the replacement level of 2.1. The study examined whether this decline aligns with the early iPhone rollout.

Are iPhones contributing to America’s falling birth rate?

The analysis was conducted by Caitlin Myers, professor of economics at Middlebury College, and her stepson Ezekiel Hooper. They overlaid county-by-county fertility statistics with AT&T’s smartphone broadband coverage to isolate the effect of iPhone adoption.

Are iPhones contributing to America’s falling birth rate?

• Women 15-29 experienced a 20-35 % reduction in expected births attributable to smartphone use.

Are iPhones contributing to America’s falling birth rate?

• Women 30-44 saw an 81-84 % suppression of the anticipated increase in births.

Are iPhones contributing to America’s falling birth rate?

• Overall, iPhone diffusion accounts for 33-52 % of the decline in the general fertility rate for women 15-44.

Are iPhones contributing to America’s falling birth rate?

Counties with the highest AT&T iPhone prevalence recorded the steepest birth-rate drops, especially among teens and twenty-somethings.

Are iPhones contributing to America’s falling birth rate?

The authors argue that the demographic shift affects Social Security, Medicare, economic growth, housing markets, education systems, military recruitment, and political representation. Fewer births translate into fewer future workers, consumers, taxpayers, and innovators.

Are iPhones contributing to America’s falling birth rate?

Myers and Hooper noted that the iPhone-birth-rate link persisted after controlling for economic variables such as recessions and housing market fluctuations. In January 2026, psychologist Jean Twenge testified before the U.S. Senate on the broader effects of smartphones on youth mental health and academic performance. Media commentator Michael Smerconish emphasized that reduced in-person interaction—driven by phone use—diminishes opportunities for sexual activity, a view echoed by New York Times opinion writer Christine Emba, who described fertility as a lagging indicator of social interaction.

Are iPhones contributing to America’s falling birth rate?

Some analysts contend that economic downturns, exemplified by the 2008 recession, are the primary drivers of falling births. While the NBER study controls for such factors, critics argue that residual economic influences may still be under-estimated.

Are iPhones contributing to America’s falling birth rate?

The study presents a range of impact estimates (33-52 % overall, 20-35 % for younger women, 81-84 % for older women), reflecting uncertainty about the precise causal pathway. Direct mechanisms linking screen time to reduced conception remain unverified, highlighting a need for longitudinal research.

Are iPhones contributing to America’s falling birth rate?

• “Is the iPhone the most effective form of birth control ever invented?” — Michael Smerconish, CNN host

Are iPhones contributing to America’s falling birth rate?

• “If you’re on your phone, you’re not having a personal interaction. And if you’re not having a personal interaction, you’re not having sex.” — Michael Smerconish, CNN host

Are iPhones contributing to America’s falling birth rate?

• “The researchers wrote: Overall, the diffusion of the iPhone explains 33–52% of the decline in the general fertility rate among women aged 15–44.” — Researchers (Myers & Hooper)

Are iPhones contributing to America’s falling birth rate?

• “Zoom In: Myers explained that when economists observe declining birth rates, they ask: [w]hether births are falling because people are just choosing to have fewer children, they want to have fewer children, or whether there’s something else going on where they’re just not as likely to form relationships or get pregnant.” — Caitlin Myers, professor of economics

Are iPhones contributing to America’s falling birth rate?

Policymakers are beginning to discuss strategies for managing screen use to mitigate demographic impacts. Ongoing monitoring of fertility trends and further studies on the causal mechanisms of smartphone use are expected in the coming years.

Are iPhones contributing to America’s falling birth rate?