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In the presence of heteroscedasticity and autocorrelation of unknown forms, the covariance matrix of the parameter …
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Using the power kernels of Phillips, Sun and Jin (2006, 2007), we examine the large sample asymptotic properties of the t-test for different choices of power parameter (rho). We show that the nonstandard fixed-rho limit distributions of the t-statistic provide more accurate approximations to the...
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