TY - JOUR AU - Cook, Steven PY - 2005 TI - The Finite-Sample Bias of the Autoregressive Parameter Under Rank-based Estimation JF - Journal of Mathematics and Statistics VL - 1 IS - 1 DO - 10.3844/jmssp.2005.1.2 UR - https://thescipub.com/abstract/jmssp.2005.1.2 AB - Monte Carlo simulation is employed to examine the finite-sample properties of the estimated autoregressive parameter associated with the Dickey-Fuller and rank-based Dickey-Fuller unit root tests. While the downward bias associated with estimator under the Dickey-Fuller test has long been noted in the literature, the corresponding properties for the rank-based test have not been considered previously. The results presented show that in comparison to the DF test, increased bias is present for the rank-based test.