我在stata上利用findit命令,下载安装了xtabond2。在运行help文档中的例子——Examples
. use http://www.stata-press.com/data/r7/abdata.dta
. xtabond2 n l.n l(0/1).(w k) yr1980-yr1984, gmm(l.n w k) iv(yr1980-yr1984, passthru) noleveleq
small
. xtabond2 n l.n l(0/1).(w k) yr1980-yr1984, gmm(l.n w k) iv(yr1980-yr1984, mz) robust twostep
small h(2)
时出现如下错误
xtabond2_mata(): 3499 strtoreal() not found
<istmt>: - function returned error
r(3499);
请问这是为什么?如何纠正?
望高手解答,不胜感激