There are an estimated 1.2 billion regular smokers in the world today, approximately one third of the global population over the age of 15, and the numbers are rising (World Health Organization 2002). Studies show that many smokers still do not know that tobacco causes disease and premature...

"An AIDS epidemic threatens Ethiopia with a long wave of premature adult mortality, and thus with an enduring setback to capital formation and economic growth. The authors develop a two-sector model with three overlapping generations and intersectorally mobile labor, in which young adults...