This paper compares cooperation among Columbian and Swedish children aged 9-12. We illustrate the dynamics of the … prisoner’s dilemma in a new task that is easily understood by children and performed during a physical education class. We find … some evidence that children cooperate more in Sweden than in Colombia. Girls in Colombia are less cooperative than boys …

We explore gender differences in preferences for competition and risk among children aged 9-12 in Colombia and Sweden …

adults. We test if reciprocal behavior exists already among children 3-8 years old. Three simple anonymous allocation games … are conducted with 242 children. In a first stage, half of the children decide whether to give a bag of raisin to another … second stage the roles are reversed between the two children to test for reciprocal behavior. We find reciprocal behavior in …