Profit Analysis and Estimate of Alliance Purchase Strategy of China Steel Corporations

由铁矿石供应商与多个钢铁企业组成的供应链结构中，在钢铁企业具有线性需求函数条件下，讨论了钢铁企业的铁矿石联盟采购与单独采购的利润分配情况，得到联盟采购策略可以提高钢铁企业的整体利润的结论。然后，运用8家钢铁企业的数值，分析了保持采购联盟稳定的激励相容条件下，可能的钢铁企业利润再分配的方式。 In steel industry supply chain of one iron ore supplier and multiple steel corporations, on the con-dition of linear demand function of steel, the profit allocation is separately discussed with individual purchase and alliance purchase, and the conclusion is that the total profit of steel corporations would be higher with alliance purchase than individual purchase. Then the feasible profit re-allocation is analyzed with data of 8 steel corporations on the condition of incentive compatibility to keep the stability of purchase alliance.