隨著全球化戰場競爭越演越烈，單打獨鬥的經營方式漸漸顯露出其不足的地方，許多企業開始考慮使用團體戰策略迎戰，即本文所研究的大同盟策略。本研究探討領導廠商採用大同盟策略與跟隨廠商競爭，雙方廠商的經濟效益將如何變動？ 本研究參考Buehler and Schmutzler(2008)之Cournot競爭模型，改用Stackelberg寡占競爭模型，考慮市場規模變動與領導廠商及跟隨廠商之間的製造成本差距大小，分析及比較競爭雙方大同盟策略前後的差異。研究結果如下：1. 大同盟策略必為領導廠商帶來利潤的增加，跟隨廠商則因此受到損害。2. 當領導廠商採用大同盟策略，將增加研發經費投入，而跟隨廠商則減少投入。3. 市場規模擴大，實行大同盟策略的領導廠商之利潤成長越大。4. 生產成本差距越大時，實行大同盟策略的領導廠商之利潤成長越大。 With the globalization of the battlefield is becoming more competitive, without allies competition is gradually revealed its deficiencies. Many companies began to consider the use of corporate strategy which in this paper studied the grand alliance strategy. In this study, A vendor has a leading position use the grand strategic alliance to compete with a vendor plays the role of a follower. This study will examine the economic benefits changes of both vendors. In this study, reference to Buehler and Schmutzler (2008) economic model, but use Stackelberg oligopoly competition model, considering the changes in market size and the size of the gap between the leader and follower’s manufacturing cost, analysis and comparison of competitive differentiation before and after the grand alliance strategy. The results obtained as follows:1. The grand alliance strategy will increase profits for the leader, the following vendor therefore compromised.2. As a leader in the use of grand alliance strategy will increase R & D funding, and the follower vendors are reducing investment.3. When the market scale will make the leading vendor using the grand alliance strategy profits growth more.4. When the gap between the costs of production the greater, leading vendor using the grand alliance strategy make the profits growth more.
