Pew Research Center designed this study to assess the current state of online survey sampling methods – both probability-based and opt-in – and determine their accuracy on general population estimates ...

This report presents estimates of the number of unauthorized immigrants in the United States as of July 2023 and for earlier ...

India's demographic landscape is shifting, as revealed by the 2023 Sample Registration System report. The data indicates a declining fertility rate, a shrinking 0-14 age group, and a growing ...

The latest Sample Registration System Statistical Report 2023 shows India's elderly population is growing rapidly, raising concerns over healthcare, pensions, and social security ...

Australia's Critically Endangered eastern gray nurse shark population is increasing slowly, research that combined rigorous biological sampling and genetic sleuthing has found.