Improved Inference on Cointegrating Vectors in the Presence of a near Unit Root Using Adjusted Quantiles

Research output: Contribution to journalJournal articleResearchpeer-review

It is well known that inference on the cointegrating relations in a vector autoregression (CVAR) is difficult in the presence of a near unit root. The test for a given cointegration vector can have rejection probabilities under the null, which vary from the nominal size to more than 90%. This paper formulates a CVAR model allowing for multiple near unit roots and analyses the asymptotic properties of the Gaussian maximum likelihood estimator. Then two critical value adjustments suggested by McCloskey (2017) for the test on the cointegrating relations are implemented for the model with a single near unit root, and it is found by simulation that they eliminate the serious size distortions, with a reasonable power for moderate values of the near unit root parameter. The findings are illustrated with an analysis of a number of different bivariate DGPs.
Original languageEnglish
Issue number2
Pages (from-to)1-20
Number of pages20
Publication statusPublished - 14 Jun 2017

    Research areas

  • Faculty of Social Sciences - long-run inference, test on cointegrating relations, likelihood inference, vector autoregressive model, near unit roots, Bonferroni type adjusted quantiles


ID: 193398265