Arbeitspapier

On PPP, unit roots and panels

This paper re-assesses the panel (unit root test) evidence for PPP on four monthly data sets. We discuss and illustrate that commonly-used first generation panel unit root tests are inappropriate for PPP analysis since they are constructed for cross-sectionally uncorrelated panels. Given that real exchange rate panel data sets are - almost by construction - highly cross-sectionally correlated, so called second generation panel unit root methods that allow for and model cross-sectional dependence should be applied. Using inappropriate first generation tests, quite strong evidence for PPP is found. However, this evidence vanishes entirely when resorting to an appropriate method (e.g. the one developed in Bai and Ng, 2004a) for nonstationary cross-sectionally correlated panels. We strongly believe that our findings are relevant beyond the data sets investigated here for illustration.

Sprache
Englisch

Erschienen in
Series: Reihe Ökonomie / Economics Series ; No. 176

Klassifikation
Wirtschaft
Single Equation Models; Single Variables: Panel Data Models; Spatio-temporal Models
International Finance: General
Foreign Exchange
Thema
PPP
real exchange rate index
unit root
panel
cross-sectional dependence
factor model
Kaufkraftparität
Unit Root Test
Faktorenanalyse
Panel

Ereignis
Geistige Schöpfung
(wer)
Wagner, Martin
Ereignis
Veröffentlichung
(wer)
Institute for Advanced Studies (IHS)
(wo)
Vienna
(wann)
2005

Handle
Letzte Aktualisierung
10.03.2025, 11:44 MEZ

Datenpartner

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Objekttyp

  • Arbeitspapier

Beteiligte

  • Wagner, Martin
  • Institute for Advanced Studies (IHS)

Entstanden

  • 2005

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