| Summary: | 碩士 === 東吳大學 === 企業管理學系 === 100 === The main purpose of this study is to compare the operation performance of LED industry chains in Taiwan and China. The study is trying to use the industry life cycle of LED and literature reviews to seek the impact factor of LED upstream/midstream and downstream group. Additionally, this study uses the impact factor to analyze the operation performance and identify the decision criteria. Finally, more LED companys went public in China than before. So, we can collect more data for analysis after 2010.
This study collects thirty-seven pieces of data from Taiwan and China.We use the Pearson Correlation Analysis to find relationships between input and output.
At upstream/midstream group, the indexes of operating efficiency used in this study are R&D expenses, Fixed assets, Number of patents, and Net income. The indexes of profitability efficiency used in this study are Net Sales, Gross Margin, and Net Operating Income.
At downstream group, the index of operating efficiency used in this study are Fixed assets, Operating Expenses, Number of Employees, Number of patents, and Net income. The index of profitability efficiency used in this study is Net Sales, Gross Margin, and Net Operating Income.
First of all, this study utilizes input oriented BCC model of two-stage Data Envelopment Analysis (DEA). Secondly, it compares LED companies performance on the basis of different classifications. Finally, this study utilizes slack variable analysis and sensitivity analysis to seek the impact factor of the LED industry. We offer conclusion and recommendation and also provide a reference to the studies.
The empirical result of this study are as follows：
1. LED industry of Taiwan and China
In the upstream/midstream, China is better than Taiwan in operating efficiency, but Taiwan is better in the profitability efficiency. In the downstream, Taiwan is better in the operating efficiency and profitability efficiency.
2. Classification of scale
In the downstream, small businesses are better than other scale of businesses in both operating efficiency and profitability efficiency. There is no distinct connection between the scale of a company and its performance in the LED industry.
3. Slack variable analysis
Most of the LED companies studied still waste the input resource. Avoiding the economic storm, they should control the input index more effectively.
4. Sensitivity analysis
In Slack variable analysis, this study focuses on the stage of operating efficiency. The number of patents has the most influential effect on the upstream/midstream group, Operating Expenses on the downstream.
5. Mann-Whitney test and Kruskal-Wallis test
There is significant difference between operating efficiency and profitability efficiency only in the downstream, assuming that the research period only last for one year. If there are more pieces of data, the Sequential studies will improve the performance of analysis.
Keywords：Cross-strait、LED industry、two-stage Data Envelopment Analysis、Slack variable analysis、Sensitivity analysis、Classification of scale
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