A simple model to handle the flow of people in emergency evacuation situations is considered: at every point x, the velocity U(x) that individuals at x would like to realize is given. Yet, the incompressibility constraint prevents this velocity field to be realized and the actual velocity is the projection of the desired one onto the set of admissible velocities. Instead of looking at a microsc...

Abstract We document a novel fact about neonatal death, or death in the first month of life. Globally, mortality is disproportionately concentrated India. identify large effect birth order on that unique to India: later-born siblings have steep survival advantage relative birth-order gradient other developing countries. show India’s high prevalence maternal undernutrition and its correlation wi...