本文通过建立适合我国上市公司的用以衡量大股东股权制衡的方法,在事件研究的基础之上,对大股东股权制衡和公司并购绩效两者的关系进行了分析。实证研究表明,公司的股权制衡程度越高,并购绩效越好;在第一、二大股东股权性质相同的上市公司中,股权制衡难以发挥效用。这说明建立有效的股权制衡机制,促进大股东股权性质的多样性,对公司治理具有积极作用。
By establishing applicable methods to measure stock ownership check - and - balance of big shareholders, this article investigates the relationship between stock ownership check - and - balance of big shareholders and M&A performance on event - study methodology. Empirical results show that check - and - balance of stock ownership will improve M&A performance. In the companies whose first and second big shareholders have the same nature of ownership rights, the check - and - balance of stock ownership cannot play an active role. The results suggest that setting up the mechanism of stock ownership check - and - balance and promoting the diversification of ownership structure are beneficial to corporate governance.