注释:
①Amazon的相关数据来自美国证券交易委员会(SEC)的EDGAR系统中(https://wwwsecgov/edgar)的公司年报。实际上,在2003-2016的14个财年中,公司在2012和2014年分别亏损了39万和241万美元。但比对其当年的实际收入和费用(2012年分别是6275.2和8881.0万美元,2014年分别是4597.1和6041.7万美元),笔者认为这两笔利润亏损太小,基本上可以认为公司在2003年后都实现了盈利。.
②最新的CSMAR数据库提供了2016及以前年份的公司年报。但是本研究关注IPO初期的增长战略对公司长期增长的影响,所以需要上市公司有足够长的存续期来计算长期增长率。由于有7年及以上观测的公司太少,并不一定能很好地代表全部的上市公司,我们选择了存续期6年及以上的公司作为研究样本。因此,样本公司最晚的IPO年份为2010年。具体样本筛选步骤如下。首先,剔除了IPO后的前2年中在员工规模或营业利润上存在缺失值的公司;其次,进一步剔除了其中员工规模、营业利润、营业收入和总资产均下滑的公司(共167个,仅占全部上市公司的9.22%),这些企业在各方面的增长指标上都出现了明显亏损,不属于公司增长的研究对象。.
③为了解上市公司在IPO后的资金使用状况,我们从1197个样本中随机挑选了部分公司,逐年核对了它们年报中披露的“募集资金投资情况”信息。我们发现,其中很多公司前2年的累计投资金额超过了IPO融资总额的80%。例如,华英农业2011年的年报显示,其2009年IPO融资的5.89亿元已经累计投资了99.98%;光讯科技也在上市后的2年内投资了6.12亿元融资的89.45%。.
④582个回归分析的样本中有399个属于制造业,占比68.56%。考虑所选案例的代表性和可比性,我们从制造业中筛选典型案例。具体步骤如下。首先,计算各复合增长率指标(因变量Asse_GR、Reve_GR和Mktv_GR)的中位数;其次,选择在每个指标上都高(低)于其中位数的公司作为高(低)增长样本;最后,在“烧钱”和偏重利润增长的公司中,分别选择属于高增长和低增长的典型案例。
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