Fixed-smoothing Asymptotics and Asymptotic: F: and: t: Tests in the Presence of Strong Autocorrelation
Yixiao Sun ()
A chapter in Essays in Honor of Peter C. B. Phillips, 2014, vol. 33, pp 23-63 from Emerald Publishing Ltd
Abstract New asymptotic approximations are established for the Wald and t statistics in the presence of unknown but strong autocorrelation. The asymptotic theory extends the usual fixed-smoothing asymptotics under weak dependence to allow for near-unit-root and weak-unit-root processes. As the locality parameter that characterizes the neighborhood of the autoregressive root increases from zero to infinity, the new fixed-smoothing asymptotic distribution changes smoothly from the unit-root fixed-smoothing asymptotics to the usual fixed-smoothing asymptotics under weak dependence. Simulations show that the new approximation is more accurate than the usual fixed-smoothing approximation.
Keywords: Autocorrelation robust test; fixed-smoothing asymptotics; local-to-unity; strong autocorrelation; weak unit root; C13; C14; C32; C51 (search for similar items in EconPapers)
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Working Paper: Fixed-smoothing Asymptotics and Asymptotic F and t Tests in the Presence of Strong Autocorrelation (2014)
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