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st: re: counter variable

From   Kit Baum <>
Subject   st: re: counter variable
Date   Sat, 2 May 2009 14:13:31 -0400

Martin said

Ok, so -encode-ing will be mandatory for Maryle now...

Well, -tsspell- (SSC, Cox) is an improved version of -spell- (SSC, Cox and Goldstein). The older program did not make use of time series notions, and you could get away without -tsset- in using that tool (as -help tsspell- indicates). But the -ts- operators bring so much useful housekeeping details that it seems silly to avoid taking advantage of them. In that respect creating a numeric 'i' variable (via -encode-) that allows you to -tsset- or -xtset- the data is a minor inconvenience.

Kit Baum   |   Boston College Economics & DIW Berlin   |
An Introduction to Stata Programming |
   An Introduction to Modern Econometrics Using Stata  |

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