Causal Inference, Instrumental Variable, Ab Testing, Encouragement Design, Average Treatment Effect.
unavailable information. Literature Angrist, J. D., Imbens, G. W., ε& Rubin, D. B. (1996), “Identification of Causal Effects Using Instrumental Variables”, Journal of the American Statistical Association, 91: 444–455. Baiocchi, M., Cheng, J., & Small, D. S. (2014), “Instrumental Variable Methods