关于企业纵向规模变化趋势的实证研究-产业经济学专业论文.docxVIP

摘 摘 要 “企业纵向规模不经济猜想”认为企业的纵向规模指的是企业内部包含的 业务环节的数量。按照企业纵向规模不经济猜想，既然纵向规模不经济，企业就 有不断降低其纵向规模的动机，从时间序列来看，企业纵向规模就存在不断缩小 的趋势。本文试图运用实证检验的方法，验证在实际经济生活中是否存在这一趋 势。 本文以我国纺织制造业上市公司为研究样本，分别用表示企业经营范围集中 度的赫芬达尔指数(H)和表示产品相关性程度的相关性比率(RR)作为衡量企 业纵向规模的两个指标，建立时间序列趋势检验模型。本文提出两个有待验证的 假设：赫芬达尔指数随着时间序列呈递增趋势；产品相关性比率在时间横轴上呈 上升趋势。实证检验结果很好地支持了论文的假设，验证结果显示企业的经营范 围越来越集中，经营产品的相关程度越来越高。企业的产品相关性越高说明企业 的经营范围越集中，而经营范围越集中说明企业内包含的业务单元越少，相应的 企业的纵向规模就越小。因此，企业纵向规模呈缩小这一基本趋势在现实中真实 存在。 根据研究结果，本文分析了企业纵向规模缩小趋势对我国企业的几点启示， 提出破除大企业迷信，以业务外包的形式缩减企业的经营范围，获取竞争优势， 提高经营效益的对策建议。 【关键词】企业规模经营范围纵向分拆变化趋势实证研究 The Positive Study 00 Chaoging Trend of Eoterprises Vertical Scale Abstract The conjecture the Conjecture about enterpri隅s vertical scale diseconomy thou前t the enterprises v町tical scale diseconomy infered the quantity of the vocational work chains，which w础 contained in the intemal part of comp创úes. According to the conjecture，since the vertical scale diseconom弘 the enterprises should have reduced the size of its vertical motivation 丘。m the time series，the vertical scale ente甲rises there constantly def1ating trend.ηlis paper attempts to use empirical testing methods，the 邵阳al test in the economic life of the existence of this trend. The thesis considers the listed company of Chinas textile industry as the s阳dy samples，using the Herfindahl Index(H) which express the centralization of the business scope and the Ratio of product-related(RR) which express the products related levelωa meas旧e of enterprises vertical scale of the two indicators established trend ofthe time series model.Then it raised two assumptions: Herfindahl index has the progressive trend with time sequence. The ratio of product related has the upward trend on the time horizontal axis. Positive test results supported the thesis good assumption ，the main conclusion show that the scope of business enterprises increasingly concentrated ，business products is becoming more relevant. Enterprise products related higher scope of the enter