. xthreg2 MarketValue $control1 , rx($X1) qx(year) thnum(1) bs(300) trim(0.01) grid(100)
There exist time-invariant individual(s) (maybe only one obs):  MarketValue Age Size POE Leverage C
> ashRatio eps_d asset_growth RD z_value LargestHolderRate CEODuality TMTEquity TMTFB TMTreturnee I
> ndependent_Directors Institutional_Investors Visibility OverallCSR SensitiveIndustry market5 CSR_
> Conformity year
                 <istmt>:  3499  thestm2() not found