Objectives. We developed a micro-costing methodology to estimate the real resource costs consumed by delivery of the National Institute on Drug Abuse (NIDA) Cooperative Agreement Standard Intervention (SI) for human immunodeficiency virus (HIV) prevention, plus two enhanced modules, in a...

Forty million people are infected with HIV worldwide; twenty-five million of them are in Sub-Saharan Africa. This paper addresses the question of why Africa has been so heavily affected by HIV, and what explains the variation within Africa. I present a model that decomposes epidemic level into...