黃河泉 发表于 2016-12-4 17:29 
请把你的(全部)指令写出来,以便判断!
sqreg y x control variable, quantile(.1 .3 .5 .7 .9)
grqreg, cons ci ols olsci
std error of grqreg will not be the same as one reported after estimation. Please use the seed option of grqreg.
Only coefficients .1.3.5.7.9 will be plotted.