Talk:Sargan–Hansen test

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The Sargan test is based on the assumption that model parameters are identified via a priori restrictions on the coefficients, and tests the validity of over-identifying restrictions. The test statistic can be computed from residuals from instrumental variables regression by constructing a quadratic form based on the cross-product of the residuals and exogenous variables.[4]: 132–33 Under the null hypothesis that the over-identifying restrictions are valid, the statistic is

The Sargan test is basStub-Class Statistics articlesed on the assumption that model parameters are identified via a priori restrictions on the coefficients, and tests the validity of over-identifying restrictions. The test statistic can be computed from residuals from instrumental variables regression by constructing a quadratic form based on the cross-product of the residuals and exogenous variables. Under the null hypothesis that the over-identifying restrictions are valid, the statistic is 103.162.136.133 (talk) 12:59, 6 November 2023 (UTC)[reply]