Media type: E-Article Title: Sampling at different frequencies, and the power of panel unit root tests Contributor: Gutierrez, Luciano Published: Elsevier BV, 2009 Published in: Economics Letters, 102 (2009) 1, Seite 59-61 Language: English DOI: 10.1016/j.econlet.2008.11.012 ISSN: 0165-1765 Keywords: Economics and Econometrics ; Finance Origination: Footnote: