More on Unit Root Tests

A Study of Testing Mean Reversion in the Inflation Rate of Iran’s Provinces: New Evidence Using Quantile Unit Root Test

T his paper is to examine the mean reverting properties of inflation rates for Iran’s 25 provinces over the period from 1990:4 to 2017:7. To the end, we use various conventional univariate linear and non-linear unit root tests, as well as quantile unit root test by Koenker and Xiao (2004). Results of conventional unit root tests indicate that the null hypothesis of the unit root test...

Purchasing Power Parity Hypothesis In OIC Countries: Evidence From Panel Unit Root Tests With Heterogeneous Structural Breaks

Unit Root Tests Based On the Robust Estimator

The unit root tests based on the robust estimator for the first-order autoregressive process are proposed and compared with the unit root tests based on the ordinary least squares (OLS) estimator. The percentiles of the null distributions of the unit root test are also reported. The empirical probabilities of Type I error and powers of the unit root tests are estimated via Monte Carlo simulatio...

Convergence of Real Per Capita GDP within East Asian and Middle East Countries: Panel Unit Root Evidence

This paper examines convergence of real GDP per capita in the selected East Asian countries and this relationship with selected Middle East countries during the period 1950-2009. The reason behind this refers to the fact that East Asia countries (including China, Hong Kong, Singapore, Malaysia, Indonesia, Thailand, Japan and South Korea) have been involved in achieving success arising from regi...

Tests for Unit Roots and the Initial Observation

The paper analyzes the impact of the initial observation on the problem of testing for unit roots. To this end, we derive a family of optimal tests that maximize a weighted average power criterion with respect to the initial observation. We then investigate the relationship of this optimal family to unit root tests in an asymptotic framework. We find that many popular unit root tests are closel...

Tests for Unit Roots and the Initial Condition by Ulrich

The paper analyzes the impact of the initial condition on the problem of testing for unit roots. To this end, we derive a family of optimal tests that maximize a weighted average power criterion with respect to the initial condition. We then investigate the relationship of this optimal family to popular tests. We find that many unit root tests are closely related to specific members of the opti...