中文摘要：

研究了确定型需求条件下单一供应商和2个制造商组成的二级供应链，其中下游的一个制造商为供应商提供产能投资，并参与供应商利润分成．研究了不同决策方式下多阶段博弈的最优决策，通过数值分析讨论了需求弹性系数和融资成本系数对于联盟决策以及各方的收益的影响，具有一定的实际参考价值．

英文摘要：

Companies often face significant technical and financial risks when building new factories to ex- pand capacity. Coordination of supply chain members in capacity investments can reduce risk. This paper considered a supply chain which consisted of one supplier and two manufacturers. One of the manufacturers provided capacity investment for the upstream supplier. In return, the supplier shared some portion of its revenue with the manufacturer. This paper studied the optimal contract designs under different modes of collaboration between the manufacturer and the supplier. It analyzed the effect of optimal contracts on optimal decisions of supply chain members and on their respective profits. It obtained several insights through numerical simulations which were useful in actual negotiation.