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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

U.S. women's soccer team beats Netherlands, moves on to Olympic semifinals

Members of the U.S. women's soccer team celebrate after beating the Netherlands. Photo: Laurence Griffiths/Getty Images

The U.S. women's soccer team beat the Netherlands in a penalty kick shootout on Friday, propelling them to the semifinals of the Olympic Games.

Why it matters: The win brings the U.S. team one step closer to its quest for a historic back-to-back double — winning the Olympics after emerging victorious at the Women's World Cup. The U.S. will play Canada in the semifinals next week.

Dan Primack, author of Pro Rata
39 mins ago - World

SEC clamps down on Chinese IPOs

Illustration: Sarah Grillo/Axios

Chinese companies will be unable to go public in the U.S. unless they make new risk disclosures, according to a statement released Friday morning from SEC chair Gary Gensler.

Why it matters: Chinese companies, and tech startups in particular, are already under growing pressure from their own government. Now they're also getting squeezed by U.S. officials.

1 hour ago - Sports

U.S. swimmer Ryan Murphy causes stir with doping comments

Bronze medallist Britain's Luke Greenbank, gold medallist Russia's Evgeny Rylov and silver medallist USA's Ryan Murphy pose with their medals after the final of the men's 200m backstroke. Photo: Jonathan Nackstrand /AFP via Getty Images

U.S. swimmer Ryan Murphy raised questions about the presence of doping in swimming following a second-place finish in the men's 200-meter backstroke on Thursday.

Driving the news: Murphy, who won gold in the 200-meter backstroke race in Rio, said following his race: "At the end of the day, I do believe there’s doping in swimming. That is what it is."