The curse of natural resources in fractionalized countries

This paper develops a model that can explain why natural resources are a blessing for some countries, but a curse for others. In this model, natural resources cause fighting activities between rivalling groups. Fighting reduces productive activities and weakens property rights, making productive activities even less attractive. The aggregate production decrease exceeds the natural resources' direct positive income effect if and only if the number of rivalling groups is sufficiently large. The model thus predicts that natural resources lower incomes in fractionalized countries, but increase incomes in homogenous countries. Empirical evidence supporting this prediction is provided.