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

["R.E. De Hoyos" <redeho@hotmail.com>]

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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