Is Germany's GDP Trend-Stationary? A Measurement-With-Theory Approach / Ist das deutsche BIP trendstationär: Ein Measurement-With-Theory Ansatz
Bernd Lucke ()
Journal of Economics and Statistics (Jahrbuecher fuer Nationaloekonomie und Statistik), 2005, vol. 225, issue 1, 60-76
Abstract:
The time series properties of German GDP have been re-examined in recent research. Extending the sample to include GDP data from 1950 onwards, some researchers argued in favor of a trend-stationary rather than difference stationary representation of real log GDP. I show that this conclusion is based on an atheoretic trend model underlying the unit root tests. A simple linear trend model fails to take the post World-War II catch-up process properly into account. I use the Solow growth model to discriminate between transitional catch-up dynamics and longrun equilibrium growth. With the proper transformation of GDP data, I am able to use standard unit root tests and find that both ADF and KPSS tests suggest a difference stationary model. This evidence is supported by non-standard unit root tests which allow for polynomial trend representations.
Keywords: Solow growth model; transistional dynamics; unit root tests; Solow’sches Wachstumsmodell; Übergangsdynamik; Einheitswurzeltest (search for similar items in EconPapers)
Date: 2005
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Citations: View citations in EconPapers (3)
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Persistent link: https://EconPapers.repec.org/RePEc:jns:jbstat:v:225:y:2005:i:1:p:60-76
DOI: 10.1515/jbnst-2005-0105
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