以下表中的4大指标都参考顶刊,剔除主营业务收入小于0的行业数据
附件小样:
stkcd | year | 行业数目>1时=1 否则=0 | 占主营收入大于10%的行业数量 | 收入熵指数 | 赫芬德尔指数 |
1 | 2002 | 1 | 3 | 0.847197533 | 0.562393 |
1 | 2003 | 1 | 1 | 0.767067313 | 0.623217 |
1 | 2004 | 1 | 1 | 0.730714142 | 0.646245 |
1 | 2005 | 1 | 1 | 0.823062778 | 0.591005 |
1 | 2006 | 1 | 1 | 0.783850789 | 0.689742 |
1 | 2007 | 1 | 4 | 1.603207231 | 0.282347 |
1 | 2008 | 1 | 4 | 1.682969928 | 0.251223 |
1 | 2009 | 1 | 3 | 1.692614436 | 0.277972 |
1 | 2010 | 1 | 3 | 1.643365502 | 0.289506 |
1 | 2011 | 1 | 4 | 1.837161779 | 0.232472 |
1 | 2012 | 1 | 3 | 1.85538888 | 0.225529 |
1 | 2013 | 1 | 3 | 1.844580889 | 0.21509 |
1 | 2014 | 1 | 3 | 1.87551558 | 0.211183 |
1 | 2015 | 1 | 3 | 1.955936432 | 0.19262 |
1 | 2016 | 1 | 3 | 1.960257173 | 0.191521 |
1 | 2017 | 1 | 4 | 1.9148283 | 0.197932 |
1 | 2018 | 1 | 4 | 1.781309366 | 0.229857 |
1 | 2019 | 1 | 4 | 1.682010055 | 0.252567 |
1 | 2020 | 1 | 2 | 0.85292232 | 0.468616 |
1 | 2021 | 1 | 2 | 0.847888947 | 0.471141 |