...violence in Nigeria is not contained within a state; it spreads within a region. The economist Charles Tiebout argues that where there are possibilities of significant inter-jurisdictional externalities or spillovers, it’s better to pull resources together and create institutions with inter-jurisdictional or inter-territorial reach. Thus, strong and powerful regional police, with a region-wide presence, is better able to deal with the intra-regional nature of violence in Nigeria, including intelligence gathering, than siloed state police.