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st: New commands in SSC: -svyselmlog- and -svybsamp2-


From   "R.E. De Hoyos" <redeho@hotmail.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: New commands in SSC: -svyselmlog- and -svybsamp2-
Date   Fri, 9 Sep 2005 15:03:00 +0100

Thanks to Prof. Baum, two new Stata commands are available from the SSC archives:

-svyselmlog- Selectivity adjustment based on the multinomial logit for survey data.

DESCRIPTION
-svyselmlog- estimates the parameters of the main equation correcting for selectivity using the conditional probabilities from a multinomial logit. -svyselmlog- allows for three parametric selectivity-correction methods like the ones developed in Lee (1984), Durbin and McFadden (1984) and Bourguignon, Fournier and Gurgand (2004). Additionally, selectivity can be adjusted following Dahl's (2002) semi-parametric method.


-svybsamp2- Re-sampling for complex survey data

DESCRIPTION
-svybsamp2- creates a new data set with _N randomly drawn observations (with replacement). As with -svysamp-, the procedure respects survey design, re-sampling within different combinations of strata and PSU. Therefore using the inflation factors (pweights), the new sample can be used to get to the original "super-population".

To install the packages, type:

.ssc install svyselmlog
.ssc install svybsamp2

Rafa
________________________
R.E. De Hoyos
Faculty of Economics
University of Cambridge
CB3 9DE, UK
www.econ.cam.ac.uk/phd/red29/ *
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