how can I test if the disturbance terms are correlated within clusters
and whether thus the cluster () option after regress is suggested?
Hans
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Hans J. Baumgartner
Deutsches Institut f�r Wirtschaftsforschung (DIW Berlin)
German Institute for Economic Research
Abt. Staat / Dept. Public Economics
K�nigin-Luise-Str. 5; 14195 Berlin (Dahlem)
Tel.: 030/89789-307; Fax.: 030/89789-114 http://www.diw.de
