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Mildly Explosive Autoregression With Anti-Persistent Errors, Yiu Lim Lui, Weilin Xiao, Jun Yu
Mildly Explosive Autoregression With Anti-Persistent Errors, Yiu Lim Lui, Weilin Xiao, Jun Yu
Research Collection School Of Economics
An asymptotic distribution is derived for the least squares (LS) estimate of a first‐order autoregression with a mildly explosive root and anti‐persistent errors. While the sample moments depend on the Hurst parameter asymptotically, the Cauchy limiting distribution theory remains valid for the LS estimates in the model without intercept and a model with an asymptotically negligible intercept. Monte Carlo studies are designed to check the precision of the Cauchy distribution in finite samples. An empirical study based on the monthly NASDAQ index highlights the usefulness of the model and the new limiting distribution.