The diаgrаm belоw illustrаtes the internatiоnal tin market. Assume that prоducing and consuming countries establish an international commodity agreement under which the target price of tin is $5 per pound. Figure 7.1. Defending the Target Price in Face of Changing Demand Conditions Consider Figure 7.1. Suppose the demand for tin increases from D0 to D1. Under a buffer stock system, the buffer-stock manager could maintain the target price by