我现在要做的是进行quantile回归，并且把回归的结果保存在一个文件里边，所以用到了postfile命令。但奇怪的是，有的时候work了，多加入一两个变量就又不work了，估计总是很不稳定，不知道为什么？下面是我的程序，有高手帮助看看？？？

foreach y  in yr1 yr2 yr3 {
foreach vaz in ur ru {

tempname 1

postfile `1' zid  qq  v_dis v_age v_asq v_pop v_pchi v_gend v_edu v_enth v_Party v_const using coef_`vaz'_`y'_latc,replace

use tempMMall,clear
keep if `vaz'==1 & `y'==1
   forvalues iters1=1(1)`bsize' {
capture{           

 local qq=uniform() /* randomly draw from U[0,1] distribution */
            noisily di "TYP =" "`vaz'""  ITER =" "`iters1'"  "  qq =" "`qq'"  " year = " "`y'" "
    * estimate quantile regression for quantile qq
    
                        qreg latc dis age  asq  pop  pchi  gend edu enth  Party ,quantile(`qq') nolog
                       
                        local v_dis=_b[dis]
                        local v_age=_b[age]
                       
                        local v_asq=_b[asq]
                       
                        local v_pop=_b[pop]
                       
                        local v_pchi=_b[pchi]
                       
                        local v_gend=_b[gend]
                       
                        local v_edu=_b[edu]
                       
                        local v_enth=_b[enth] 
                         
                        local v_Party=_b[Party]
                       
                        local v_const=_b[_cons]

                        local qqz=`qq'
                         local zid=`iters1'
                        post `1' (`zid') (`qq') (`v_dis') (`v_age') (`v_asq') (`v_pop') (`v_pchi') (`v_gend')(`v_edu') (`v_enth')(`v_Party')(`v_const')
                        }
                       }
             
  postclose `1'
}
}