We examine an economy where professionals provide services to clients and where a professional can sell his practice to another. Professionals vary in quality, and clients in their need (or willingness-to-pay) for high-quality service. Efficiency is measured as the number of matches between...

We examine the effects of famine relief efforts (food aid) in regions undergoing civil war. In our model, warlords seize a fraction of all aid entering the region. How much they loot affects their choice of army size; therefore the manner in which aid is delivered influences warfare. We identify...

French Abstract: Cet article présente un modèle théorique de conflit entre deux joueurs avec intervention par une force de maintien de la paix. Cette force est considérée comme un contingent militaire qui peut, selon les circonstances, s'aligner avec l'un des deux adversaires, agir...