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Testing for Random Individual Effects with a Gauss-Newton Regression

95.4.1. Testing for Random Individual Effects with a Gauss-Newton Regression, proposed by Badi H. Baltagi. Davidson and MacKinnon (1993) gave numerous applications of the Gauss-Newton regression (GNR) in econometrics. This problem gives another example of the GNR to test for random individual effects in the popular one-way error component model used in panel data analysis. For the nonlinear regression model