中文摘要：

研究在价格和市场需求不确定的环境下，期权式契约在两阶段供应链协调中的应用．构建了不同信用违约条件下，供应链协调过程中各决策主体的决策模型．通过深入分析零售商的现货和期权最优组合订货策略和生产商的最优生产策略，得到期权式协调契约的详细设计规则，包括期权参数的取值范围以及价格参数之间的线性关系，证明了供应链中双方可以借助期权契约的价格政策达到双赢，促进风险分担，提高供应链的响应能力，实现完美协调．最后的算例验证了研究结论．

英文摘要：

This paper researches the application of option contract in two-echelon supply chain coordination when consumer demand and retail price are uncertain. Under the different credit default situation, the manufac- turer＇s and retailer＇s decision models are proposed, from which the retailer＇s portfolio procurement policy and the manufacturer＇s optimal output decision are derived. Then we reveal the conditions of successful coordina- tion with option contract, including （i） the range of option price and exercise price （ii） the negative correlation between option price and exercise price. Our studies show the efficiency of option contract on the increasement of profit for two parties in supply chain, the enhancement of risk sharing, the improvement of supply chain responsiveness, and the realization of channel coordination. Finally, the research conclusions are validated by an example.