[Julian Reif]

(1) Add native support for reading Parquet files.

(2) Add built-in support in ivregress for the Sanderson-Windmeijer (SW) first-stage test of weak identification when there are multiple endogenous regressors. (This test is currently available in ivreg2.)

[Tommy Morgan]

Allow/create a few fill patterns for graphs!

[ericmelse]

The standard format of the result produced in the Stata result window by the sum command while using the , d option, to display the additional statistics, is like:

. sysuse auto, clear
. sum mpg, d

                        Mileage (mpg)
-------------------------------------------------------------
      Percentiles      Smallest
 1%           12             12
 5%           14             12
10%           14             14       Obs                  74
25%           18             14       Sum of wgt.          74

50%           20                      Mean            21.2973
                        Largest       Std. dev.      5.785503
75%           25             34
90%           29             35       Variance       33.47205
95%           34             35       Skewness       .9487176
99%           41             41       Kurtosis       3.975005

But, in the above the result values r(sum), r(min) and r(max) are not included:

. return list

scalars:
                  r(N) =  74
              r(sum_w) =  74
               r(mean) =  21.2972972972973
                r(Var) =  33.47204738985561
                 r(sd) =  5.785503209735141
           r(skewness) =  .9487175964588155
           r(kurtosis) =  3.97500459645325
                r(sum) =  1576
                r(min) =  12
                r(max) =  41
                 r(p1) =  12
                 r(p5) =  14
                r(p10) =  14
                r(p25) =  18
                r(p50) =  20
                r(p75) =  25
                r(p90) =  29
                r(p95) =  34
                r(p99) =  41

although there is ample room available to include them.

My proposal to include them in the window report is:

                            Mileage (mpg)
---------------------------------------------------------------------
      Percentiles      Smallest
 1%           12             12       Obs                  74
 5%           14             12       Sum of wgt.          74
10%           14             14       Mean                 21.2973
25%           18             14       Std. dev.             5.785503

50%           20                      Variance             33.47205
                        Largest       Skewness               .9487176
75%           25             34       Kurtosis              3.975005
90%           29             35       Sum                1576
95%           34             35       Min                  12
99%           41             41       Max                  41

I suppose the above does not meet the criterium of the next rocket science contribution to the field of (medical) statistics or econometrics, but, using sum, d is a daily routine and having all results available on the fly might be of use for many Stata users.

[Clyde Schechter]

I agree with adding the sum to the statistics reported in the Results window. But min and max are redundant: Stata already shows the four smallest and four largest values, so the first and last of those, respectively, are the values of the min and max.