U.S. adolescents spend more than one hour per day on smartphones during school hours, with social media accounting for the largest share of use, according to research published Jan. 5, 2026, in JAMA. The findings have relevance for educators, parents and policymakers. 

A new study published in the INFORMS journal Marketing Science has found that some of the most widely considered online advertising safety and fairness policies—ads that are designed to help ensure that women, minorities and other protected classes are not disproportionately excluded from job, education and financial opportunities—may actually boost ad platform revenues while improving fairness outcomes.

The CDC dramatically reduced the number of routine childhood vaccinations and said decisions about whether to get some of them should be based on "shared clinical decision-making." Surveys from the Annenberg Public Policy Center show that many people are unclear about what that means.

About The Study: In this cohort study, exposure to Migrant Protection Protocols was associated with higher rates of trauma during migration among asylum seekers. Such policies may be associated with adverse health outcomes for asylum seekers, with potential downstream implications for U.S. public health and security. The Migrant Protection Protocols were introduced in January 2019 and changed U.S. asylum procedures by requiring certain asylum seekers to remain in Mexico while awaiting immigration proceedings.

Researchers are proposing a new strategy for local governments to make municipalities more resilient against climate change. The “compounded resilience” strategy lays out how local governments can take advantage of opportunities to both limit adverse impacts of climate change on their communities and reduce the greenhouse gas emissions that drive climate change.