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Meta halted internal research that purportedly showed that people who stopped using Facebook became less depressed and anxious, according to a legal filing that was released on Friday.

The social media giant was alleged to have initiated the study, dubbed Project Mercury, in late 2019 as a way to help it “explore the impact that our apps have on polarization, news consumption, well-being, and daily social interactions,” according to the legal brief, filed in the United States District Court for the Northern District of California.

The filing contains newly unredacted information pertaining to Meta.

The newly released legal brief is related to high-profile multidistrict litigation from a variety of plaintiffs, such as school districts, parents and state attorneys general against social media companies like Meta, Google’s YouTube, Snap and TikTok.

The plaintiffs claim that these businesses were aware that their respective platforms caused various mental health-related harms to children and young adults, but failed to take action and instead misled educators and authorities, among several allegations.

“We strongly disagree with these allegations, which rely on cherry-picked quotes and misinformed opinions in an attempt to present a deliberately misleading picture,” Meta spokesperson Andy Stone said in a statement. “The full record will show that for over a decade, we have listened to parents, researched issues that matter most, and made real changes to protect teens—like introducing Teen Accounts with built-in protections and providing parents with controls to manage their teens’ experiences.”

A Google spokesperson said in a statement that “These lawsuits fundamentally misunderstand how YouTube works and the allegations are simply not true.”

“YouTube is a streaming service where people come to watch everything from live sports to podcasts to their favorite creators, primarily on TV screens, not a social network where people go to catch up with friends,” the Google spokesperson said. “We’ve also developed dedicated tools for young people, guided by child safety experts, that give families control.”

Snap and TikTok did not immediately respond to a request for comment.

The 2019 Meta research was based on a random sample of consumers who stopped their Facebook and Instagram usage for a month, the lawsuit said. The lawsuit alleged that Meta was disappointed that the initial tests of the study showed that people who stopped using Facebook “for a week reported lower feelings of depression, anxiety, loneliness, and social comparison.”

Meta allegedly chose not to “sound the alarm,” but instead stopped the research, the lawsuit said.

“The company never publicly disclosed the results of its deactivation study,” according to the suit. “Instead, Meta lied to Congress about what it knew.”

The lawsuit cites an unnamed Meta employee who allegedly said, “If the results are bad and we don’t publish and they leak, is it going to look like tobacco companies doing research and knowing cigs were bad and then keeping that info to themselves?”

Stone, in a series of social media posts, pushed back on the lawsuit’s implication that Meta shuttered the internal research after it allegedly showed a causal relationship between its apps and adverse mental-health effects.

Stone characterized the 2019 study as flawed and said it was the reason that the company expressed disappointment. The study, Stone said, merely found that “people who believed using Facebook was bad for them felt better when they stopped using it.”

“This is a confirmation of other public research (“deactivation studies”) out there that demonstrates the same effect,” Stone said in a separate post. “It makes intuitive sense but it doesn’t show anything about the actual effect of using the platform.”

CNBC’s Lora Kolodny contributed reporting.

WATCH: Final trades: Meta, S&P Global and Idexx Lab.

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CNBC Daily Open: Some hope after last week’s U.S. market rout

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CNBC Daily Open: Some hope after last week's U.S. market rout

Traders work on the floor of the New York Stock Exchange (NYSE) on Nov. 21, 2025 in New York City.

Spencer Platt | Getty Images

Last week on Wall Street, two forces dragged stocks lower: a set of high-stakes numbers from Nvidia and the U.S. jobs report that landed with more heat than expected. But the leaves that remained after hot tea scalded investors seemed to augur good tidings.

Even though Nvidia’s third-quarter results easily breezed past Wall Street’s estimates, they couldn’t quell worries about lofty valuations and an unsustainable bubble inflating in the artificial intelligence sector. The “Magnificent Seven” cohort — save Alphabethad a losing week.

The U.S. Bureau of Labor Statistics added to the pressure. September payrolls rose far more than economists expected, prompting investors to pare back their bets of a December interest rate cut. The timing didn’t help matters, as the report had been delayed and hit just as markets were already on edge.

By Friday’s close, the S&P 500 and Dow Jones Industrial Average lost roughly 2% for the week, while the Nasdaq Composite tumbled 2.7%.

Still, a flicker of hope appeared on the horizon.

On Friday, New York Federal Reserve President John Williams said that he sees “room” for the central bank to lower interest rates, describing current policy as “modestly restrictive.” His comments caused traders to increase their bets on a December cut to around 70%, up from 44.4% a week ago, according to the CME FedWatch tool.

And despite a broad sell-off in AI stocks last week, Alphabet shares bucked the trend. Investors seemed impressed by its new AI model, Gemini 3, and hopeful that its development of custom chips could rival Nvidia’s in the long run.

Meanwhile, Eli Lilly’s ascent into the $1 trillion valuation club served as a reminder that market leadership doesn’t belong to tech alone. In a market defined by narrow concentration, any sign of broadening strength is a welcome change.

Diversification, even within AI’s sprawling ecosystem, might be exactly what this market needs now.

What you need to know today

And finally…

The Beijing music venue DDC was one of the latest to have to cancel a performance by a Japanese artist on Nov. 20, 2025, in the wake of escalating bilateral tensions.

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Japanese concerts in China are getting abruptly canceled as tensions simmer

China’s escalating dispute with Japan reinforces Beijing’s growing economic influence — and penchant for abrupt actions that can create uncertainty for businesses.

Hours before Japanese jazz quintet The Blend was due to perform in Beijing on Thursday, a plainclothesman walked into the DDC music club during a sound check. Then, “the owner of the live house came to me and said: ‘The police has told me tonight is canceled,'” said Christian Petersen-Clausen, a music agent.

— Evelyn Cheng

Correction: This report has been updated to correct the spelling of Eli Lilly.

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Google’s new AI model puts OpenAI, the great conundrum of this market, on shakier ground

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Google's new AI model puts OpenAI, the great conundrum of this market, on shakier ground

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Americans are holding onto devices longer than ever and it’s costing economy

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Americans are holding onto devices longer than ever and it's costing economy

If you are holding onto your aging printer or cracked smartphone longer than you had planned, you are not alone.

Heather Mitchell, 69, retired and living in Tucson, Arizona, is content with her phone even though it is old by smartphone standards.

“My Samsung Galaxy A71 is six-years-old. It’s hanging in there surprisingly well for a jalopy. I’ve had issues with it, and still do, but they are minor,” said Mitchell. “I love Samsung phones, but can not afford a new one right now. A new phone would be a luxury.”

The average American now holds onto their smartphone for 29 months, according to a recent survey by Reviews.org, and that cycle is getting longer. The average was around 22 months in 2016.

While squeezing as much life out of your device as possible may save money in the short run, especially amid widespread fears about the strength of the consumer and job market, it might cost the economy in the long run, especially when device hoarding occurs at the level of corporations.

Research released by the Federal Reserve last month concludes that each additional year companies delay upgrading equipment results in a productivity decline of about one-third of a percent, with investment patterns accounting for approximately 55% of productivity gaps between advanced economies. The good news: businesses in the U.S. are generally quicker to reinvest in replacing aging equipment. The Federal Reserve report shows that if European productivity had matched U.S. investment patterns starting in 2000, the productivity gap between the U.S and European economic heavyweights would have been reduced by 29 percent for the U.K., 35 percent for France, and 101% for Germany.

Experts agree lost productivity and inefficiency are the unintended consequences of people and businesses clinging to aging technology.

“Think about how much internet speeds have changed in the past decade or more. In the 2010s, 100MB speeds were considered high speed and very good. A short 10 years later and we’re operating at 1GB speeds, which is roughly 10 times faster,” said Cassandra Cummings, CEO of New Jersey-based electronics design company Thomas Instrumentation. Operating at higher GB speeds requires different electronic hardware, and a lot of the older technology can’t handle it.

“Those devices were engineered when no one could fathom speeds that much faster would be mainstream,” Cummings said.

That can be a drain on nationwide networks as well.

“Both the cellular and internet infrastructure has to operate to be backwards compatible in order to support the older, slower devices. Networks often have to throttle back their speeds in order to accommodate the slowest device,” Cummings said. “Often entire sections of networks or company internal networks are running slower than they would if all devices were up to the newer standards,” she added.

Cummings doesn’t deny that staying up to date with new devices and hardware is expensive.

“Many companies, especially small businesses, and individual people can’t afford to constantly upgrade to the latest and greatest devices,” she said.

To ease the transition to new technologies, she says there should be designs that are repairable or modular rather than the constant purge and replace cycles. “So perhaps future devices can have a partial upgrade in say ethernet communications rather than forcing someone to purchase an entirely new computer or device,” Cummings said. “I’m not a fan of the throw-away culture we have these days. It may help the economy to spend more and force upgrades, but does it really help people who are already struggling to pay bills?” she said.

Indeed, entrepreneurs in the device resale market see the longer-lived tech as a success story that can be improved upon. Steven Athwal, CEO of the UK-based The Big Phone Store — which specializes in refurbished phones — says devices longevity is not the problem. “The issue is the lag. Businesses and individuals are trying to squeeze modern workloads out of old hardware, heavy processing, rendering, generation, and admin, and that creates a productivity drag. Things like slow processors, outdated software, and degraded batteries on older tech waste energy and morale,” Athwal said.

He adds that when people hold onto their phones or laptops for five or six years, the repair and refurbishment market becomes an active part of the economy. But right now, in both European, American, and global markets, too much of that happens in the shadows.

“It’s unregulated, underreported, and underutilized. If governments and big tech supported refurbishment properly, aging devices could become part of a sustainable circular economy,” Athwal said, improving the second-hand cycle by extending software support, improving access to parts, and treating repair as infrastructure.

“That’s how you disable constant replacement. No need to constantly push upgrades, which financially strains both small and large businesses alike,” Athwal said.

Still, some device manufacturers have found ways to entice consumers to ditch their older phones for newer ones. For instance, Apple just had one of its most successful new launches with the iPhone 17, and artificial intelligence could be a game-changer.

Najiba Benabess, dean of the business school at Neumann University, says rising prices and sustainability concerns are among reasons “America’s gadgets are aging out,” but the market should be focused on slowing productivity, increasing repair and maintenance expenses, and limited access to software updates and efficiency gains.

“Small businesses, in particular, lose valuable hours each year due to lagging systems, creating what economists call a ‘productivity drag,'” Benabess said. On a national scale, this translates to billions of dollars in lost output and reduced innovation. “While keeping devices longer may seem financially or environmentally responsible, the hidden cost is a quieter erosion of economic dynamism and competitiveness,” she added.

Most people still want the newest and most up-to-date phones and tablets, according to Jason Kornweiss, senior vice president of advisory services at Diversified, a global technology solutions provider, but research does show a widening gap between businesses and individuals when it comes to aging devices.

“Corporations with hundreds or thousands of people are not investing at the same rate,” Kornweiss said, adding that technology is changing so fast IT departments can’t keep up with the pace and that bloated corporations need to vet the newest technology, which takes time, and by the time they do the vetting, something new has arrived anyway. The result: businesses with increasingly long-in-the-tooth technology.

“Businesses establish shelf-life that is multi-year. Employees look at replacing devices within an organization as too tedious and people cringe when the IT department comes with a new device,” Kornweiss said, even when it is a meaningful upgrade, he added.

The price to the organization is then paid in lack of productivity, inability to multitask and innovate, and needless, additional hours of work that stack up. Workplace research conducted by Diversified last year found that 24% of employees work late or overtime due to aging technology issues, while 88% of employees report that inadequate workplace technology stifles innovation. Kornweiss says he doesn’t expect there’s been any improvement in those numbers over the past year.

There’s a disconnect between the numbers and behavior. Many workers report that aging devices stifle productivity, but like a favorite pair of shoes or an old sweater, they don’t want to give them up to learn the intricacies of a new device (which they’ll learn and then have to replace with another). Familiarity can trump productivity for many workers. But the result of that IT clinginess is felt in the bottom line.

“Productivity is hampered and it all has a tangible impact on the economics,” Kornweiss said.

The biggest commodity a worker has is time, he says, and older devices gobble that up. Bring-your-own-device (BYOD) policies can be a savior for businesses slow to upgrade, with individuals using their own more functional devices easily able to integrate into most workplace systems these days, Kornweiss said. Another option for companies that don’t want to buy a bunch of quickly dated devices is to lease.

Kornweiss sees a future where technology continues to advance at warp speed and companies will continue to have trouble keeping up. And individuals like Heather Mitchell will continue to hang on to their devices.

“I tend to hang onto my phone until I have no choice in the matter. In 26 years, this is only my fifth phone,” Mitchell said.

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