.        * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~--;
.  regress     KWage89    zIQYr89   BornWher   zEd90 ;

  Source |       SS       df       MS                  Number of obs =    9671
---------+------------------------------               F(  3,  9667) =  535.53
   Model |  3.6903e+11     3  1.2301e+11               Prob > F      =  0.0000
Residual |  2.2205e+12  9667   229700339               R-square      =  0.1425
---------+------------------------------               Adj R-square  =  0.1422
   Total |  2.5895e+12  9670   267791909               Root MSE      =   15156

------------------------------------------------------------------------------
 KWage89 |      Coef.   Std. Err.       t     P>|t|       [95% Conf. Interval]
---------+--------------------------------------------------------------------
 zIQYr89 |   3659.033   196.5917     18.612   0.000       3273.672    4044.394
BornWher |   3371.901   639.6385      5.272   0.000       2118.075    4625.726
   zEd90 |   3094.551   197.7993     15.645   0.000       2706.823    3482.279
   _cons |   17710.83   164.3312    107.775   0.000       17388.71    18032.95
------------------------------------------------------------------------------

. summarize    KWage89    zIQYr89   BornWher   zEd90 ;

Variable |     Obs        Mean   Std. Dev.       Min        Max
---------+-----------------------------------------------------
 KWage89 |   10200    16320.27   16308.31          0     183240  
 zIQYr89 |   11878   -.2652904   1.008244         -3          3  
BornWher |   12685    .0689003   .2532945          0          1  
   zEd90 |   10358   -.1599363   1.023902   -5.47883   2.866014  

.  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~--;
.    save  jan6c.dta,replace;
(Note: file jan6c.dta not found)
file jan6c.dta saved

. * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~--;
. 
end of do-file

. exit, clear