The dataset used for this paper comes from the baseline data of the evaluation of Familias en Acción, a program implemented by the Colombian government to foster human capital accumulation among poor children living in small municipalities. The program, modeled after the Mexican PROGRESA, provides monetary transfers to mothers in beneficiary families, conditional on having completed some requirements: (a) children under seven should be taken to growth and development check-ups, (b) children between 7 and 17 years old should regularly attend school. In order to understand the characteristics of our sample, it is important to roughly understand the requirements to.