What is the Wald estimator?
It is the beta one coefficient when Z, the IV, is a bnary variable (also the IIT estimator)
What is the meaning and formula of Intention to Treat Effect (ITT)?
It is the effect of eligibility for treatment on outcomes
Defined as TOT*compliance rate
What is TOT?
TOT is effect of treatment on those treated.
TOT = ITT if there are no always takers or defiers.