我的命令结果是:
. matrix best=e(b)
. scalar bprice=best[1,1]
. matrix vest=e(v)
. scalar vprice=vest[1,1]
. scalar tprice=bprice/sqrt(vprice)
. di "t statistic for H0: b_price = 0 is" tprice
t statistic for H0: b_price = 0 is.
做了好几遍都是显示不出来那个结果,请问各位大侠这是什么原因?