Leightner JE and T Inoue (2007). “Tackling the Omitted Variables Problem without the Strong Assumptions of Proxies.” EJOR 178(3): 819-840.
Leightner JE and T Inoue (2007). “Tackling the Omitted Variables Problem without the Strong Assumptions of Proxies.” EJOR 178(3): 819-840.