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| From | Lukas Borkowski <570722@soas.ac.uk> |
| To | "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |
| Subject | st: Significance test with -pscore- and -attnd- |
| Date | Fri, 9 Aug 2013 17:32:23 +0200 |
Dear Statalist, I am using Stata 12.1 and run an impact evaluation on a two-period panel dataset using -pscore- and related commands (written by Sascha O. Becker and Andrea Ichino). I got myself a bit confused and would really appreciate your help: After running -pscore- to estimate the propensity score using the first panel round (baseline data) only, should I - keep only matched observations? - keep only observations within the common support? - estimate the ATT with -attnd- using both panel rounds or only the post round? - Do I have to convert my dataset from long to wide to estimate the ATT? Moreover, the -attnd- command provides the standard error and a t-statistic. How can I see whether the ATT is significant (as, for example, shown but not explained in Khandker et al., 2010)? Thank your very much for your help! Best, Lukas # Lukas Borkowski University of London, School of Oriental and African Studies (SOAS) M: 570722@soas.ac.uk * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/