Tracking 65 million workers at over 280,000 US firms, the study found junior employment at generative AI adopters fell about 9% relative to senior employment within six quarters, driven mainly by slower hiring.
An analysis of 2.05 billion Reddit comments found that discussions grow more negative over time, and that the drift disappears once the uniqueness of comments is accounted for. In an experiment with 4,000 people, negativity rose only when participants were rewarded for standing out.
In a randomized study of 781 US adults, doing three kind acts a week for others cut depression, anxiety and loneliness over two weeks. Doing three kind things for yourself raised depression scores by about 11 points and anxiety by about 14, even though people enjoyed it more.
Testing 48 bonobos, chimpanzees, gorillas and orangutans 10 times over 1.5 years, researchers found stable individual differences in cognition; nonsocial tasks correlated strongly with each other, while social cognition tasks did not correlate with anything.
In a 2022 national survey of 860 Americans, 26% said they had had a mental illness. Those with a strong mental health identity had a 94% predicted chance of backing more state healthcare spending, versus 56% for those with a weak one.
Across 50,916 whisky auctions and seven experiments, age stated as a length ("10 years") felt longer than age stated as a year ("since 2015"). Length-framed bottles fetched 8.9% higher prices, while year framing raised what people would pay for used goods by 17%.
Among poor U.S. allies from 1992 to 2021, a one standard deviation rise in UN General Assembly abstentions and strategic absences, about 7 to 8 more votes, was followed by roughly $83 million more aid from the U.S., World Bank and IMF.
Across 740,786 federal charges from 2010 to 2019, defendants assigned to a judge who had been a public defender were up to 2.5 percentage points less likely to be incarcerated, and trial sentences were about 16 months shorter.
Diaries from 243,095 American adults show weekly time with friends fell from about 350 to 170 minutes between 2003 and 2024, while the share of Friday evening spent with friends dropped from 9 to 4 percent, now no different from a weeknight.
Across 13 elementary schools, 3.14% of enrolled girls were climbing playground structures at recess versus 1.45% of boys, and girls aged 6 to 8 spent far more of their climbing time perched at the top of jungle gyms.