There is link from the Stata homepage for new GLM commands
(http://www.stata.com/merror/) :
"Three new commands are available for Stata 8 to estimate generalized linear
models when one or more covariates are measured with error.
It is well known that such errors lead to attenuation of estimated effects,
and the new commands adjust for that attenuation to produce correct standard
errors and test statistics. These commands allow adjustments to be made in
the Generalized Linear Model framework using the following methods:
Instrumental variables
Regression calibration
Simulation/extrapolation (SIMEX) "
Most intriguingly, these commands are written as binary code.
Scott
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