Conditional transfer programs have been shown to improve child health. PROGRESA, for instance, where nutritional supplements were linked to the participation in various educational programs, has had a significant impact on increasing child growth and in reducing the probability of child stunting. However, it is unclear if this improvement is because more resources are available to the household, or because the program improves the access of the household to health care facilities (Skoufias, 2001). More importantly, it is not completely obvious what is the role played by the conditionality. .