(This may sound circular): when you are interested in causal effects that are confounded in the data you see. I am not sure exactly what you are asking. The right sequence of events is you first decide what you are interested in, and then find a method to get it, not vice versa.
(This may sound circular): when you are interested in causal effects that are confounded in the data you see. I am not sure exactly what you are asking. The right sequence of events is you first decide what you are interested in, and then find a method to get it, not vice versa.