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st: xtcsd error

From   May Ster <>
Subject   st: xtcsd error
Date   Wed, 29 Jun 2011 18:04:45 +0100

Dear Statalist,

I've attempted to check for cross-sectional dependence in panel-data
models using the command -xtcsd-

i do as the following

xtreg depv indv1 indv2 indv3 ...indv10, fe


-xtcsd, pesaran abs-

stata gives ;
unknown function *sqrt()

in addtion when - xtcsd, frees- is implemented

the errors are ;

-There are not enough common observations to perform Frees or Friedmand tests-

then when xtcsd, pesaran is implemented;

does anyone know how to solve this problem?

Thank you very much in advance,

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