A typo in -areg postestimation- entry, Stata .pdf manual?

[Carlo Lazzaro]

Dear All,
reading the Example 2, -areg postestimation- entry, Stata .pdf manual,

The squared residuals...

should be

The squared fitted values...

instead, as per the following toy-example:

. use https://www.stata-press.com/data/r18/auto2, clear
(1978 automobile data)

. areg mpg weight gear_ratio, absorb(rep78)

Linear regression, absorbing indicators             Number of obs     =     69
Absorbed variable: rep78                            No. of categories =      5
                                                    F(2, 62)          =  41.64
                                                    Prob > F          = 0.0000
                                                    R-squared         = 0.6734
                                                    Adj R-squared     = 0.6418
                                                    Root MSE          = 3.5109

------------------------------------------------------------------------------
         mpg | Coefficient  Std. err.      t    P>|t|     [95% conf. interval]
-------------+----------------------------------------------------------------
      weight |  -.0051031   .0009206    -5.54   0.000    -.0069433    -.003263
  gear_ratio |    .901478   1.565552     0.58   0.567    -2.228015    4.030971
       _cons |   34.05889   7.056383     4.83   0.000     19.95338     48.1644
------------------------------------------------------------------------------
F test of absorbed indicators: F(4, 62) = 1.117               Prob > F = 0.356

. predict fitted, xb

. g sq_fitted=fitted^2

. areg mpg fitted sq_fitted, absorb(rep78)

Linear regression, absorbing indicators             Number of obs     =     69
Absorbed variable: rep78                            No. of categories =      5
                                                    F(2, 62)          =  46.50
                                                    Prob > F          = 0.0000
                                                    R-squared         = 0.6939
                                                    Adj R-squared     = 0.6643
                                                    Root MSE          = 3.3990

------------------------------------------------------------------------------
         mpg | Coefficient  Std. err.      t    P>|t|     [95% conf. interval]
-------------+----------------------------------------------------------------
      fitted |  -.9305602   .9537856    -0.98   0.333     -2.83715    .9760302
   sq_fitted |   .0462785   .0227219     2.04   0.046     .0008582    .0916989
       _cons |   19.24899   9.725618     1.98   0.052    -.1922457    38.69022
------------------------------------------------------------------------------
F test of absorbed indicators: F(4, 62) = 1.278               Prob > F = 0.288

.

[Enrique Pinzon (StataCorp)]

Hi Carlo,

Thanks for point this out. We will fix it.

Enrique