多元化经营是否降低了企业的财务风险？——来自中国上市公司的经验证据
吴国鼎, 张会丽
Does Diversification Reduce Financial Risk? Evidence from Chinese Listed Firms
WU Guo-ding, ZHANG Hui-li
中央财经大学学报 . 2015, (08): 94 -101 . 

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