sophiafinn 发表于 2013-2-7 08:25
in your case
capture drop program bootaaa
请问为什么是sureg呀,只用reg可以吗?我试了好多次,只用reg都不行,没办法把两次回归的系数乘在一起。
capture program drop bootmm
program bootmm, rclass
syntax [if] [in]
reg (wtopics r1 l1namount l1nsimp lagrank yrestab l1namou1 i.time) `if' `in'
return scalar m1x1 = _b[l1namount]
syntax [if] [in]
reg (reach r3 l1namount l1nsimp wtopics posperau lagrank yrestab l1namou1 i.time) `if' `in'
return scalar y1m1 = _b[wtopics]
end
bootstrap r(m1x1) r(y1m1) , bca reps(5): bootmm
estat boot, percentile bc bca
怎么才能把m1x1和y1m1乘起来,看这个新变量的bootstrap区间呢?