how to instrument variables in stata why do you include an endogenous variable in ivregress stata which of the following variables does exogenous conditional analysis include in the first stage of stata what variables are considered conditional if an instrument is exogenous conditional upon a few exogenous variables, do I include these in the first stage of an analysis? which variable makes an instrument exogenous what is the dependent variable in stata in ivregress what variable would be exogenous when using stata which ivregress variable can be used as an endogenous variable why is exog2 necessary in the first stage is the variable x exogenous if an instrument is exogenous conditional upon a few exogenous variables, do you include them only in the first stage? when a variable is an exogenous variable, do you include it in the second stage of the instrument? is y an endogenous variable why does the instrument x contain endogenous variables if a conditional instrument is exogenous, do you include these variables in the first stage why do you need to include a variable in second stage stata if my instrument is exogenous conditional upon a few exogenous variables, do I include them only in the first stage? ivregress: what is the difference between x and exog2 in stata why do i need to include variables in two stage stata