Identification of Causal Effects with Multiple Instruments: Problems and Some Solutions
NBER Working Paper No. 25691
---- Acknowledgments ----
We thank Stephane Bonhomme, Vishal Kamat, and Ed Vytlacil for helpful comments, and Christine Blandhol and John Bonney for outstanding research assistance. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.
---- Disclosure of Financial Relationships for Alexander Torgovitsky ----
Research supported in part by National Science
Foundation grant SES-1530538.