. reg ahe age

      Source |       SS       df       MS              Number of obs =    7711
-------------+------------------------------           F(  1,  7709) =  230.43
       Model |  23005.7375     1  23005.7375           Prob > F      =  0.0000
    Residual |  769645.718  7709  99.8372964           R-squared     =  0.0290
-------------+------------------------------           Adj R-squared =  0.0289
       Total |  792651.456  7710   102.80823           Root MSE      =  9.9919

------------------------------------------------------------------------------
         ahe |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
         age |   .6049863   .0398542    15.18   0.000     .5268613    .6831113
       _cons |   1.082275   1.184255     0.91   0.361    -1.239187    3.403737
------------------------------------------------------------------------------


. reg ahe age if bachelor == 0

      Source |       SS       df       MS              Number of obs =    4002
-------------+------------------------------           F(  1,  4000) =   48.56
       Model |  2846.11544     1  2846.11544           Prob > F      =  0.0000
    Residual |  234434.405  4000  58.6086014           R-squared     =  0.0120
-------------+------------------------------           Adj R-squared =  0.0117
       Total |  237280.521  4001  59.3053039           Root MSE      =  7.6556

------------------------------------------------------------------------------
         ahe |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
         age |   .2978627   .0427436     6.97   0.000     .2140616    .3816639
       _cons |   6.521941   1.269993     5.14   0.000     4.032048    9.011834
------------------------------------------------------------------------------

. reg ahe age if bachelor == 1

      Source |       SS       df       MS              Number of obs =    3709
-------------+------------------------------           F(  1,  3707) =  233.02
       Model |  26310.4073     1  26310.4073           Prob > F      =  0.0000
    Residual |  418558.237  3707  112.910234           R-squared     =  0.0591
-------------+------------------------------           Adj R-squared =  0.0589
       Total |  444868.644  3708  119.975362           Root MSE      =  10.626

------------------------------------------------------------------------------
         ahe |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
         age |    .924596   .0605696    15.27   0.000     .8058429    1.043349
       _cons |  -4.439163   1.799991    -2.47   0.014    -7.968234   -.9100928
------------------------------------------------------------------------------