st: xtpcse and the need for a lagged DV in pooled time-series

[Edward Crenshaw <crenshaw.4@sociology.osu.edu>]

Does the xtpcse command in Stata automatically eliminate the need to 
introduce lagged dependent variables in pooled time-series?  I realize 
there may be theoretical reasons for including lagged DV's, but does xtpcse 
eliminate the statistical need for such lags?  I've had reviewers tell me 
yes AND no, so I'm a little confused on this point.

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