使用的是xtivreg2指令,指令的格式是符合标准的,但是结果却出不来。stata显示的是:
指令 xtivreg2 cor11 fexpgdp k l fd expgdp market (trangdp=disnor2),fe
equation not identified; must have at least as many instruments not in
the regression as there are instrumented variables
r(481);
找了很多相关书籍都没有说明,请问高手们这是什么问题,怎么解决?