Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/189361 
Year of Publication: 
2006
Series/Report no.: 
Queen's Economics Department Working Paper No. 1085
Publisher: 
Queen's University, Department of Economics, Kingston (Ontario)
Abstract: 
We develop a new method, based on the use of polar coordinates, to investigate the existence of moments for instrumental variables and related estimators in the linear regression model. For generalized IV estimators, we obtain familiar results. For JIVE, we obtain the new result that this estimator has no moments at all. Simulation results illustrate the consequences of its lack of moments.
Subjects: 
polar coordinates
simultaneous equations
JIVE
moments
instrumental variables
JEL: 
C10
C13
Document Type: 
Working Paper

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