Andrews, Donald W.K.; Guggenberger, Patrik - Cowles Foundation for Research in Economics, Yale University - 2007
This paper considers a mean zero stationary first-order autoregressive (AR) model. It is shown that the least squares estimator and t statistic have Cauchy and standard normal asymptotic distributions, respectively, when the AR parameter rho_n is very near to one in the sense that 1 - rho_n =...