. logit st dua boardsize indd exesh first ttt fiststate m_mb m_liq m_pro m_tang m_liatoast lnm_firmsize d_mb d_liq d_pro
> d_tang d_liatoast lnd_firmsize
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outcome does not vary; remember:
                                  0 = negative outcome,
        all other nonmissing values = positive outcome
r(2000);


不懂啊，是变量太多了么