由於全球化競爭已經成為一種趨勢，競爭方式不再只侷限於單一個體，已逐漸擴展至整體供應鏈之競爭方式，企業間的合作方式逐漸成為焦點，必須透過供應鏈間的互相合作與協調才能提升現今市場中的競爭能力，因此考量供應鏈加入資訊共享，以提供供應商更多資訊制定決策，希望透過資訊共享，以達提升供應鏈利潤的目的。但資訊會造成供應商需求、生產計劃及生產成本等之變動，使零售商價格與服務品質的訂定困難，而使供應鏈間產生激烈的價格與服務競爭，而影響整體供應鏈利潤。
資訊共享與供應鏈的協調有相當大的關係，資訊掌握越多，越能夠有協調與合作的空間，本研究欲探討零售商資訊共享模式對價格與服務決策之影響，而零售商將決定是否與供應商共享資訊。資訊共享模式下，供應商可考量零售商共享之需求資訊做價格決策，因此會影響零售商需求，進而影響零售商價格與服務的決策。本研究運用資訊共享協調供應鏈，並運用賽局理論制定價格及服務水準，透過分析資訊共享與無資訊共享下供應鏈之利潤，發現供應鏈擁有需求資訊共享時，可使供應商獲得顧客需求資訊及需求誤差，以降低需求變異，增加利潤，但資訊準確程度越高，供應商所承擔之共享成本也會隨之提升，因此供應商需找出供應鏈中之最佳資訊共享準確程度，從而使供應鏈利潤增加、降低成本，且運用價格折扣的方式使零售商自願與之共享資訊，以透過資訊共享以做出更好的管理決策。

Since global competition has become a phenomenon, the way of competition is no longer limited to a single individual, and has gradually expanded to the competition of the entire supply chain, and therefore, information sharing is considered in the supply chain to provide suppliers with more information to make decisions Hopefully via information sharing, the purpose of improving the profits of the supply chain can be achieved.
Information sharing is considerably correlated to the coordination of the supply chain. The more information is mastered, the more room for coordination and cooperation. This study aims to investigate the impacts that the information sharing of retailers has on the on the price and service decisions, and retailers will decide whether to share information with suppliers. This study coordinates the supply chain with information sharing and determines prices and service levels by using a game theoretic model, through the analysis of the profits of the supply chain under information sharing and no information sharing. It is found that when the supply chain has information sharing of demand, suppliers can obtain information and errors of demand for consumers, to reduce demand variation and increase profits. However, the more accurate the information, the higher the cost of sharing borne by the supplier, and therefore, the supplier has to find out the optimal accuracy of information sharing in the supply chain, so that the profit of the supply chain increases, reduces costs, and uses price discounts to enable retailers to voluntarily share information with them to make better management decisions through information sharing.

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