The paper presents results of a comparative analysis of the health and nutritional effects of cash crop production in 6 countries--The Gambia, Guatemala, Kenya, Malawi, the Philippines, and Rwanda. The 6 country case studies were conducted during the same time period and used a similar, although not identical, research protocol. Participation in cash crop schemes resulted in increases in household income. Short-term increases in household income did not result in a decrease in the incidence of illness in preschool-aged children nor in the total time that preschoolers were ill. Increases in household income did result in increases in the preschooler's energy consumption; however, the income/calorie consumption links, although significant, were weak. The household income gains did not have an immediate or large impact on preschooler nutritional status. While, in the longer term, increases in income may bring about improvements in preschooler health, in the short term, it appears that increases in income must be accompanied by improvements in the health environment in order to have a significant effect in reducing preschooler morbidity and improving child nutritional status.