SVAR 6个变量,设置的短期约束如下,为什么提示过度识别自由度为6,但是矩阵B系数没有估计(为单位阵)?(WARNING: B matrix is fixed (structural innovation variances not estimated)!!!)跪求大神们指教!@e1 = C(1)*@e2+C(2)*@e3 + C(3)*@e4 + C(4)*@e5 + C(5)*@e6+ C(6)* @u1
@e2 = C(7)*@e1 +C(8)*@e5+ C(9)*@e6+ C(10)*@u2
@e3 = C(11)*@e1 + C(12)*@u3
@e4 = C(13)*@e1 + C(14)*@e5 + C(15)*@u4
@e5 = C(16)*@e1 + C(17)*@e2 + C(18)*@e6 + C(19)*@u5
@e6 = C(20)*@e1 + C(21)*@u6


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