We study the implementation problem for exchange economies when agents can renegotiate the outcome assigned by the planner and can collude. We focus on the use of sequential mechanisms and present a simple sufficient condition for implementation with renegotiation in strong perfect equilibrium....

We study the strategic interaction between two firms competing in quantites which decide whether exporting into each other market. The product is homogeneous and production entails constant returns to scale. Scope effects are present. By dealing with two types of trade costs, namely per unit and...