Abstract.Squared‐residual autocorrelations have been found useful in detecting nonlinear types of statistical dependence in the residuals of fitted autoregressive‐moving average (ARMA) models (Granger and Andersen, 1978; Miller, 1979). In this note it is shown that the normalized squared‐residual autocorrelations are asymptotically unit multivariate normal. The results of a simulation experiment confirming the small‐sample validity of the proposed tests is r
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