Joakim Westerlund
Professor, Programme director – Master of Data Analytics and Business Economics
A Simple Test for Nonstationarity in Mixed Panels with Incidental Trends
Author
Summary, in English
Ng (2008) shows how the cross-sectional variance of the observed panel data can be used to construct a simple test for the proportion of non-stationary units. However, in the case with incidental trends the test is distorted. The present note shows how the distortions can be substantially reduced by the use of bias-adjustment. It also investigates the local power of the bias-adjusted test, which is shown to suffer from the same incidental trends problem previously only documented for conventional tt-tests.
Department/s
- Department of Economics
Publishing year
2014
Language
English
Pages
160-163
Publication/Series
Economics Letters
Volume
125
Issue
2
Document type
Journal article
Publisher
Elsevier
Topic
- Economics
Keywords
- Unit root test
- Panel data
- Incidental trends
- Bias correction
- Local asymptotic power
Status
Published
ISBN/ISSN/Other
- ISSN: 0165-1765