Question: 'Test the omnibus null hypothesis H0: 1 2 0 for the Huber M estimator in Duncans regression of occupational prestige on income and

'Test the omnibus null hypothesis H0: β1 ¼ β2 ¼ 0 for the Huber M estimator in Duncan’s regression of occupational prestige on income and education.

(a) Base the test on the estimated asymptotic covariance matrix of the coefficients.

(b) Use the bootstrap approach described in Section 21.4.

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