Dear Statalisters (and Stata programmers)
I don't know if I have not-the-newest Stata manual books, but in the one I have there is an error in the way that the mathematical expression of the Arellano-Bond estimator (programmed by xtabond) is written down. In the xt book, on page 31, The expressions for delta2-hat and for Q2 should include A2^(-1), and not A2.
Tewodaj
~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~
Tewodaj Mogues
Dept. of Agricultural and Applied Economics
University of Wisconsin - Madison
427 Lorch St. #317, Taylor Hall
Madison, WI 53706
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
