摘 要 組織間的監理機制的選擇長久以來一直是個重要課題。許多文獻提出透過社會關係可以影響績效。然而大部分文獻中並沒清楚交代以社會關係為監理機制是否適用在每一種情境當中都可以提升績效。 本文以鑲嵌理論和交易成本理論為出發點。首先探討是否社會控制的鑲嵌程度是否能夠影響交易成本中的績效，進一步探討在各種不同情境中，鑲嵌程度對績效的影響。本文選擇了三種情境，市場不確定、獲利影響、供應風險。 結果證明鑲嵌程度與談判績效有負相關，與假設有差異。而與生產績效有正相關。而在不同情境中，市場不確定性，對生產績效有負影響。獲利影響對談判績效有負影響。其他因素則無干擾效果。 鑲嵌關係的提升會造成談判效率的降低，與過去文獻結果不大一致。本文認為過度的鑲嵌關係造成彼此太過熟悉對方的生產和作業流程及產能，因此容易要求對方做價格或數量上的折讓，致使談判無效率。而市場不確定高時，過度鑲嵌致使外在訊息無法進入，而無法影響談判效率。供應風險高時，買賣雙方受限於市場體制的力量，無法透過關係來影響。 Abstract The selection of interorganizational governance is always an important issue. There are many papers assert that social relationship has great influence on performance. However, most of those papers did not clearly describe under what kind of scenarios the social relationship could promote the performance. This study is based on embeddedness theory and transaction cost theory and tries to explore whether the degree of embeddedness has impacts on supply chain performance (Negotiation and Production efficiency) .Further, this study develops three scenarios, namely market uncertainty, profit impact and supply risk, and further examines the moderator effect of which between embeddedness and supply chain performance. After empirical analysis, the results are not totally the same as the expected assumptions. Embeddedness has a negative influence on negotiation efficiency and a positive impact on production efficiency. Under the different scenarios, market uncertainty has a moderating effect between embeddedness and production efficiency. In addition, profit impact has a moderator effect between embeddedness and the negotiation efficiency. However, the result found that the supply risk has no significant moderator effect. The greater the relationship embedded, the worse the performance became. This is different from the past results. We considered that the fine understanding of production and operation detail between trading party will has a negative effect on performance .Because each of them tend to ask for concessions on price or volume. Under market uncertainty, there is no effect on performance arise from overembeddedness which leads to the shortage of innovative and abundant information. As for supply risk, the power of market limit the effect of relationship on performance.