Weak Consistency of Quasi-Maximum Likelihood Estimates in Multivariate Generalized Linear Models
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Abstract
In this paper, we study quasi-likelihood equation \tsm_i=1^nX_i(y_i-\mu(X_i'\beta))=0 for multivariate generalized linear models (GLMs). Under mild conditions, we prove the asymptotic existence of the solution \wh\beta_n to the above equation and present its convergence rate, that is \wh\beta_n-\beta_0=O_p(\underline\lambda_n^-1/2), where \beta_0 is the true value of parameter \beta and \underline\lambda_n denotes the smallest eigenvalue of the matrix S_n=\tsm_i=1^nX_iX_i'.
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