. ivregress gmm k0 k02y k0pl k0pe pl pl2 plpe ply pe pe2 pey y y2
note: pl2 omitted because of collinearity
note: plpe omitted because of collinearity
note: ply omitted because of collinearity
note: pe omitted because of collinearity
note: pe2 omitted because of collinearity
note: pey omitted because of collinearity
note: y omitted because of collinearity
note: y2 omitted because of collinearity
k0 collinear with k0pl pl
r(459);
如上，输入第一行命令，出来的下面部分，想请教大家怎么解决才能得出自己想要的结果？因为是初次做这个，问题可能有点幼稚。。。