纯新手/(ㄒoㄒ)/~~求大佬

whether there is a significant difference in profitability between companies that have B and that do not

当一个变量存在和不存在的时候怎么用stata看有没有显著差异啊？p值吗？我做了regress以后B这个变量的P>|t|是0.000

还是用hypothesis testing什么的呢

TAT 真心没学到家