The design of a comprehensive social security system is a critical issue to many countries and regions. This paper presents a comparative economic welfare analysis on typical social security systems from the viewpoints of “all-generation welfare” and “each-generation welfare,” respectively....

Underweight and obesity are associated with adverse health outcomes throughout the life course. We estimated the individual and combined prevalence of underweight or thinness and obesity, and their changes, from 1990 to 2022 for adults and school-aged children and adolescents in 200 countries...