This paper is inspired by a puzzling empirical fact that despite the importance of controlling migration for their future, the host countries allocate very limited amounts of resources to the struggle against illegal immigration. The present model analyzes this issue in the context of low...

Paired maternal and infant hair samples were analyzed to evaluate the levels and compositions of organic contaminants (OCs) in maternal and fetus in Guangzhou, China. The associations between fetal exposure to OCs and birth size were examined. Phthalate esters (PAEs), alternative plasticizers...