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The class of models includes nonlinear simultaneous equations models and other models of interest. A problem in constructing efficient instrumental variables estimators for such models is that the ...
T. H. Gronwall, Note on the Derivatives with Respect to a Parameter of the Solutions of a System of Differential Equations, Annals of Mathematics, Vol. 20, No. 4 (Jul., 1919), pp. 292-296 ...
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