我用stata pvar的程序包回归后出现下列问题
. pvar lev_debt lag_LIQ lag_ln_sales lag_tan lag_por lag_grow lag_tax_effect dummy_300 largest out_share , lag(1) gmm impulse
> monte 500 decomp (30)
Current memory allocation
current memory usage
settable value description (1M = 1024k)
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set maxvar 5000 max. variables allowed 1.909M
set memory 10M max. data space 10.000M
set matsize 200 max. RHS vars in models 0.322M
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12.231M
GMM started : 11:00:02
accumulating matrices equation 1,2,3,4,5,6,7,8,9,10,calculating b2sls
matrix has missing values
r(504);
如何解决?


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