Economics at your fingertips  

The Power of the "Objective" Bayesian Unit-Root Test

Francis Ahking ()

No 2004-14, Working papers from University of Connecticut, Department of Economics

Abstract: Some researchers, for example, Koop (1992), and Sims (1988), advocated for Bayesian alternatives to unit-root testing over the classical approach using the augmented Dickey-Fuller test (ADF). This paper studies the power of what Koop (1992) has called the "Objective" Bayesian approach to unit-root testing. Koop's "objective" Bayesian test is interesting in light of the call by Phillips (1991a, 1991b) for more objective Bayesian analysis of time series. We apply the "objective" Bayesian unit-root test to a study of long-run purchasing power parity (PPP) in the post-Bretton Woods era and also Monte Carlo simulations. Overall, our results suggest that the "objective" Bayesian test is biased in favor of trend-stationarity. We conclude that, at least for the "objective" Bayesian test, it is not better than the classical ADF approach in unit-root tests, and because of its bias, the "objective" priors suggested by Koop is not appropriate.

JEL-codes: C11 C22 F31 (search for similar items in EconPapers)
Pages: 21 pages
Date: 2004-07
New Economics Papers: this item is included in nep-ecm and nep-ets
Note: I wish to thank Professor Stephen M. Miller, participants at the Southern Economic Association Annual Meetings, and Department of Economics, University of Connecticut, brown-bag seminar for comments on an earlier draft of this paper. Remaining errors are my sole responsibilities.
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (9) Track citations by RSS feed

Downloads: (external link) Full text (application/pdf)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link:

Access Statistics for this paper

More papers in Working papers from University of Connecticut, Department of Economics University of Connecticut 365 Fairfield Way, Unit 1063 Storrs, CT 06269-1063. Contact information at EDIRC.
Bibliographic data for series maintained by Mark McConnel ().

Page updated 2023-11-28
Handle: RePEc:uct:uconnp:2004-14