title: Glitch in the seq() function of egen?
body: <p>While I was trying to set up a monthly Dynamic Panel Data in Stata:</p>
  
  <pre><code>clear all
  drop _all
  cls
  scalar mnpe     = 3                     
  scalar cssize   = 6                        
  scalar ldataset = mnpe * cssize         
  
  set obs `=ldataset'
  
  //Define variables for the Timewindow to be analized
  scalar tstart   = 480                   //From: 2000/January
  scalar tend     = `=tstart' + `=cssize' //To  : 2000/June
  
  //Generate id and time for the Dynamic Panel
  egen id         = seq(), block(`=cssize')
  egen time       = seq(), from(`=tstart') to(`=tend') 
  format %tm time                         //Period definition tm: monthly
  
  //Declare THE Dynamic Panel
  tsset id time, monthly                  //Period definition   : monthly
  //Generate endogenous &amp; exogenous variables
  gen y           = rnormal(5,1)
  gen x1          = rnormal(10,1)
  
  //List them up, by id
  list, sepby(id)
  
  xtline x1, tlabel(#3) overlay
  </code></pre>
  
  <p>I came across with the following missing time data:</p>
  
  <pre><code>     +-----------------------------------+
       | id     time          y         x1 |
       |-----------------------------------|
    1. |  1   2000m1   3.821689   10.56352 |
    2. |  1   2000m2   4.572973   12.12826 |
    3. |  1   2000m3   5.798653   8.558586 |
    4. |  1   2000m4   8.021777   12.33319 |
    5. |  1   2000m5   3.917288   9.168543 |
    6. |  1   2000m6   4.780022      10.94 |
       |-----------------------------------|
    7. |  2   2000m1    4.70402   9.462132 |
    8. |  2   2000m2   4.164953   11.23561 |
    9. |  2   2000m3    7.09228   10.03154 |
   10. |  2   2000m4   4.429367   10.36254 |
   11. |  2   2000m5   3.171889   9.664372 |
   12. |  2   2000m7   4.455237   10.33883 |
       |-----------------------------------|
   13. |  3   2000m1   3.643499   12.20954 |
   14. |  3   2000m2   4.201683   9.507583 |
   15. |  3   2000m3   4.809181   11.44474 |
   16. |  3   2000m4    5.51936   10.25571 |
   17. |  3   2000m6   5.279757   9.676065 |
   18. |  3   2000m7   5.379889   11.40392 |
       +-----------------------------------+
  </code></pre>
  
  <p>As you can see, there are missing months. Not sure what exactly is going on, though I don't think is the discrepancy due to daylight savings time.</p>