States with restrictive abortion policies saw slower growth in the proportion of female medical school applicants following the 2022 reversal of Roe v. Wade, according to a new study published in the open-access journal PLOS Global Public Health by Amrit Kirpalani of Western University, Canada, and colleagues.

A new Dartmouth study maps the interplay of personal choice and social networks that can lead to a phenomenon they call "overarming," where the collective cost of firearm ownership outweighs the individual benefits of possessing a gun. The team developed a model based in evolutionary game theory to characterize how social factors drive individuals' choices to buy a firearm, how these choices influence others' choices, and whether the choices made by all members of society leads to overarming. 

A study of wetlands conservation policy in Florida and California suggests a way to reduce flood damage while retaining economic gains from development. The study recommends both an offset policy and a locally varying tax on development to compensate for increased flood risk.