Extensive research has shown comprehensive early intervention can improve the developmental outcomes of disadvantaged children. However, little is known about the effectiveness of center-based programs for infants and toddlers; relatively rare in the developing world and typically of low...

Empirical studies of tropical forest hunting have shown the existence of marked spatial gradients of hunting effort, game harvest, and animal abundance, as hunters mostly hunt near villages, roads, and rivers. The mechanisms underlying these patterns have, however, hitherto been poorly known....