"The Top 10 competitiveness enterprises in the wire and cable industry of China during 2013-2014" and the empirical analysis of return on net assets ratio distribution of the top 50 enterprises

To strengthen the credibility and indicative level of the annual rating of top ten competitiveness enterprises in the wire and cable industry, we choose some indicators with high representativeness and authority in the rating system-ROE( return on equity) to conduct empirical analysis. ROE is the most comprehensive indicator to measure cooperate finance. ROE is made up of many factors. For example, the DuPont System of Analysis decomposes the ROE to certain indicator layer by layer. Therefore, according to "Lyapunov central-limit theorem", we can conclude that a company's ROE should be in normal distribution. In a similar way, the ROE of a same business should fluctuate with the average rate of profit. Thus, we can check out the distribution of the ROE in the same industry in one certain year. In this way, we can on the one hand gain access to more data, and on the other hand, we can exclude the impact on the ROE posed by macroeconomic changes. Fortunately, the wire and cable industry that we are reviewing boasts more listed companies (itself or the parent company listing). The high credibility and competitiveness of this data prove the great credibility, authority and reference worth of the results of this empirical study.

………… 【Please refer to "The competitiveness report on 'the Top 10 competitiveness enterprises in the wire and cable industry of China during 2013-2014'(integrated edition)" for details】