本文以我国上市公司2002至2003年的数据,通过综合分部信息和控股子公司信息构造了一个有效的多元化经营衡量指标,在此基础上实证考察了多元化经营与公司价值之间的关系。结果表明,平均来看我国上市公司的多元化经营与公司业绩问呈显著的负相关关系,当公司经营4个及4个以上行业时,公司价值开始显著降低。进一步研究表明,多元化经营与公司价值之间的负相关关系受到政府干预程度、控股股东的产权性质和集团隶属关系的影响。
This paper empirically investigates the potential effects of a diversification strategy upon firm value by developing a composite diversification measure based on both divisional and subsidiary information using a sample of listed companies from the years 2002 and 2003. We find that diversification of operations has, on average, remarkably negative effects upon firm value. In particular, when a firm engages in four industries or more, firm value starts to fail. Furthermore, this negative correlation between diversification and firm value could be attributed to government intervention, controlling shareholders' ownership, and the firm's organisational structure.