Understanding the timing and determinants of age at menarche is key to determining potential linkages between onset of puberty and health outcomes from a lifecourse perspective. Tiziana Leone and Laura Brown show that the age at menarche is declining across low- and middle- income countries and discuss implications.

Over the last two decades, the share of U.S. children under age 18 who live in a multigenerational household (with a grandparent and parent) has increased dramatically. Yet we do not know whether this increase is a recent phenomenon or a return to earlier levels of coresidence. Using data from the d …

A new paper heats up an old debate.

Researchers uncovered stark disparities between white people and minorities across thousands of categories of pollution, including trucks, industry, agriculture and even restaurants.

[There is substantial evidence of the potential for class bias in the use of standardized tests to evaluate college applicants, yet little comparable inquiry considers the written essays typically

Call it what it is.

Can sidewalks, pickup trucks and American flags offer clues? Revisiting readers’ perceptions of politics, density and place.