各位大大:

使用stata，給定矩陣ab的限制式，然後給予指令
matrix A=(1,0,0,0,0,0\.,1,.,.,.,0\.,.,.,.,0,.\.,.,.,.,0,.\.,.,0,.,.,.\0,0,0,0,1,.)
matrix B=(1,0,0,0,0,0\0,1,0,0,0,0\0,0,1,0,0,0\0,0,0,1,0,0\0,0,0,0,1,0\0,0,0,0,0,1)
svar dlpcpi dly dtho di dle dlfa,aeq(A ) beq(B )

結果出現下列錯誤訊息
With the current starting values, the constraints are not sufficient for identification
....
....
....

These constraints place 52 independent constraints on A and B
The order condition requires at least 51 constraints.
Identification requires a rank of 72, but the identification matrix only has rank 71

可以請高手指點一下嗎?
看不懂With the current starting values, the constraints are not sufficient for identification
以及Identification requires a rank of 72, but the identification matrix only has rank 71是代表甚麼意思?

感激不盡