发帖
雷达卡
变量及数据样例：
展示方便，格式实际为分析用得面板格式。
us10-20-0817.xlsx
(8.32 MB, 需要: RMB 200 元)
| code |
| company name |
| list day |
| year |
| R&D expense |
| R&D expense/total sales |
| intangible assets/total assets |
| roa |
| roe |
| q |
| ros |
| eps |
| sales growth |
| profit margin |
| firm size |
| industry |
| leverage |
| firm age |
| marketcap |
| total assets |
| total sales |
| intangible assets |
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