a1 University of California, San Diego
This paper derives sufficient conditions for global identification in nonlinear models characterized by a finite number of unconditional moment restrictions. The main contribution of this paper is to provide a set of assumptions that are alternative to those of Gale-Nikaidô-Fisher-Rothenberg, and which when satisfied guarantee that the moment conditions globally identify the parameters of interest.
I would like to thank the co-editor, Jin Hahn, as well as anonymous referees for their comments and suggestions. This paper was presented at econometric seminars at Boston College, Brown, Columbia, Concordia, CREATES, Stanford, Toulouse, UC Berkeley, UCL, UCLA, University of Pennsylvania, and Yale, whose participants provided valuable feedback. All errors are my own.