原检验结果是:Arellano-Bond test for AR(1) in first differences: z = -1.59 Pr > z = 0.113
Arellano-Bond test for AR(2) in first differences: z = -1.03 Pr > z = 0.304
------------------------------------------------------------------------------
Sargan test of overid. restrictions: chi2(10) = 15.02 Prob > chi2 = 0.131