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From | "Clyde Schechter" <clyde.schechter@einstein.yu.edu> |
To | statalist@hsphsun2.harvard.edu |
Subject | Re: st: RE: Random start to random number sequence |
Date | Wed, 18 Aug 2010 19:28:37 -0700 |
My approach to setting seeds overcomes most of the pitfalls that Bill Gould points out with respect to times and dates, etc. I take out my wallet and examine the first currency note in it. I strip off any letters from the serial number, and use that as the seed. I put the note at the back of my wallet so I won't reuse that serial number. (I spend currency notes at a faster rate than I start new pseudo-random sequences!) My main reason for using this approach is that I sometimes have to generate randomization sequences for studies carried out by collaborators who also use Stata. To keep these collaborators from figuring out the next random assignment coming up, I need to keep them from knowing what seed I started with. This method serves the purpose. And it's simple to carry out. Clyde Schechter, MA MD Associate Professor of Family & Social Medicine Please note new e-mail address: clyde.schechter@einstein.yu.edu * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/