|   变量名称  |       (1) rwar  |       (2) nplr  |       (3) lnz  |    
|   cepu  |       −0.00787*  |       −0.00214***  |       −0.13282***  |    
|   
  |       (0.00426)  |       (0.00026)  |       (0.04878)  |    
|   N  |       410  |       410  |       410  |    
|   R2  |       0.4892  |       0.1543  |       0.2158  |    
|   识别不足检验  |       118.05***  |       118.05***  |       118.05***  |    
|   工具变量检验  |       468.56***  |       468.56***  |       468.56***  |