This dissertation encompasses three chapters that explore determinants of parental investments in their children???s health and education in developing countries. Below are the individual abstracts for each chapter. Chapter 1: Child Ability, Parental Investments and Child Nutrition in Ecuador This paper investigates the role of family composition and child cognitive ability in explaining how resource-constrained households make nutritional investment decisions in their children. Parents have private information about their children???s abilities and health that is typically not available to researchers. I use a unique panel household dataset from Ecuador???s Bono de Desarrollo Humano that contains a measure of child cognitive ability an...