Hi,

I have panel data and I would like to expand the dataset by one month. So I would like to expand each "stock" time series to "2020m4". Here is the data I have:
Code:
* Example generated by -dataex-. To install: ssc install dataex
clear
input double stock float(date exret)
 1 722           .
 1 721  .016571907
 1 720 -.021690037
 2 722  -.08885346
 2 721   .03352593
 2 720 -.013057826
 3 722   -.1733951
 3 721   .05968564
 3 720  -.13112126
 4 722  .025679555
 4 721  -.04374008
 4 720   .05557474
 5 722 -.023603665
 5 721 -.005209302
 5 720   .05193632
 6 722   .01481354
 6 721  -.04118994
 6 720  .033280447
 7 722   .04653623
 7 721  -.04578867
 7 720   .04011091
 8 722   .07355644
 8 721  -.03574601
 8 720   .08482119
 9 722  -.08222993
 9 721   .06095662
 9 720   -.0952904
10 722  -.05354553
10 721 .0007637492
10 720  -.09510595
end
format %tm date
label values stock unit_id
label def unit_id 1 "130062", modify
label def unit_id 2 "130088", modify
label def unit_id 3 "130298", modify
label def unit_id 4 "130502", modify
label def unit_id 5 "130591", modify
label def unit_id 6 "131844", modify
label def unit_id 7 "132808", modify
label def unit_id 8 "134057", modify
label def unit_id 9 "13466Q", modify
label def unit_id 10 "13471D", modify
I have tried "predict" thinking that it might expand the dataset automatically but that is not the right way to proceed. Please help!