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This study takes the chairman as the starting point to study whether the chairman-CEO duality can affect the performance, with a sample of 3568 the board of directors of the listed company leadership characteristics and performance during 2008–2018 in NEEQ market. The results found that the chairman as CEO is conducive to improving the business performance. Through the sample study of enterprise size division, it is found that in small enterprises, the chairman as CEO has a more significant positive impact on business performance than in large enterprises.
Li et al. (Fri,) studied this question.