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Teens are growing up more slowly than they did two decades ago, and today's 18-year-olds act like the 15-year-olds of the 1990s, per a new study. Researchers found that U.S. teens are engaging in adult activities — drinking, driving, dating and working for pay — later than they used to, delaying the transition from adolescence into adulthood.

The big picture: Avoid falling into the trap of seeing these trends as all good or all bad. "It's a tradeoff," lead researcher and author of a new book, iGen, Jean Twenge tells Axios. Today's teens may be less prepared for adulthood, but they're safer, with rates of car accidents and teen pregnancies falling dramatically.

Expand chart
Data: The Decline in Adult Activities Among U.S. Adolescents, 1976–2016, Twenge et al.; Chart: Lazaro Gamio / Axios

The takeaways:

  • 66% of 12th graders surveyed in 2014 had tried alcohol, compared to 81% in 1994
  • 73% of them had drivers' licenses, down from 85% 20 years prior
  • 58% went on dates, compared to 83% of 12th graders in 1994
  • 56% worked for pay, down from 72% in 1994

The prevalence of risky behaviors has also declined, says Jeffrey Arnett, a professor of psychology whose work is cited in the study. Rates of binge-drinking, teen pregnancy and teen crime are lower than ever.

Yes, but: The transition into adulthood has slowed down so much that Arnett says people age 18 to 29 are living through a new life stage between adolescence and adulthood: "emerging adulthood." The consequences of this are that teens are less prepared for college and the workplace, Twenge says. "What really strikes me is that 'adulting' is now a verb," she says. "What's the alternative? Are you gonna go back to being a child?"

Be smart: Some of these behavioral changes can be attributed to technology, specifically the rise of the smartphone, Twenge recently wrote in the Atlantic. Teens are spending less time out getting into trouble and more time at home on their phones. But delaying adulthood also has to do with the fact that people live longer than they used to and more people expect to go to college instead of directly entering the workforce.

Twenge's Atlantic piece also claimed that heavy smartphone use has an adverse effect on teen mental health. But to say smartphones are destroying a generation is alarmist, tech writer and researcher Alexandra Samuel wrote in JSTOR in response. Data shows that "high school students who use social media a lot aren't any more depressed than those who use it a little," she wrote.

But Twenge is right to say technology is quickly widening generational gaps, Samuel tells Axios. "The pace of change is so rapid now that we raise our children in a world completely different from the one we grew up in," she says.

What's next: As technology advances, these trends could accelerate, Twenge says. "Soon 18-year-olds could look like the 13-year-olds" of the past.

Go deeper

State Department partners with aid group welcoming Afghan refugees to U.S.

Secretary of State Antony Blinken speaking in Washington, D.C., on Sept. 14. Photo: Mandel Ngan/POOL/AFP via Getty Images

Secretary of State Antony Blinken announced Thursday that the State Department is partnering with Welcome.US, an aid group helping to welcome and support Afghan refugees who fled their country for the U.S.

Why it matters: The partnership is part of the Biden administration's Operation Allies Welcome, which involves the processing and resettlement of the more than 65,000 Afghans evacuated during the U.S. military withdrawal from Afghanistan.

Workout economy hangs fate on celeb trainers

Illustration: Annelise Capossela/Axios

At-home workout companies are turning fitness instructors into stars.

What's new: Tonal, which makes a wall-mounted, strength training device, said its machines will start streaming live classes in October. 

Dan Primack, author of Pro Rata
3 hours ago - Economy & Business

An inside look at Intuit's Mailchimp acquisition

Illustration: Aïda Amer/Axios

When Mailchimp recently agreed to be acquired by Intuit for $12 billion, we noted how it was the richest sale ever of a private bootstrapped company. Now we know more about why the Atlanta-based email marketing company never took outside funding.

The big picture: Mailchimp founder and CEO Ben Chestnut tells Axios that it was all about timing.