| Summary: | 碩士 === 國立交通大學 === 經營管理研究所 === 107 === With the rapid development of the Internet, online shopping has gradually become the mainstream. For e-commerce companies, the effective application of operational management costs is more important. The previous literature has already touched on the static relationship between operating costs and performance. However, there are only a handful of documents that take time into account. This study explores the dynamic correlation between the operating costs of e-commerce companies and their business performance. This study is based on 39 large-scale e-commerce companies in the world, discussing the growth trends and dynamic correlations between operating costs and business performance in the past five years (2013-2017), and further on the online sales of e-commerce companies. The ratio of the amount to the total sales amount is discussed together with the moderating effect of the above dynamic relevance. The results of this study show that the dynamic correlation is not significant without being moderated by the company's online sales ratio. Considering the moderating variables, the proportion of online sales, low proportion, medium proportion, and only for online sales, the company's dynamic relevance is significant, and low- and medium-proportion e-commerce companies have a negative effect, and e-commerce companies that sell only through the internet have positive effects. At last, relevant recommendations are made to e-commerce companies and shareholders based on the research results.
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