Error while running ivreg2h command

[Ipsita Rakshit]

To all the Statalists,

I am trying to run the ivreg2h command in Stata to obtain the Lewbel IVs but I am getting the error message "option endog() not allowed". How do I resolve this? Kindly help me in this regard.

Regards,
Ipsita

[Andrew Musau]

ivreg2h is from SSC (FAQ Advice #12). You do not show your exact command, but the syntax for specifying the endogenous variable and instruments is

ivreg2h yvar (endogvar= instruments) xvars

There is no such option -endog()-. See

help ivreg2h