Is Germany's GDP Trend-Stationary? A Measurement-With-Theory Approach / Ist das deutsche BIP trendstationär: Ein Measurement-With-Theory Ansatz

Author(s):  
Bernd Lücke

SummaryThe 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.

2017 ◽  
Vol 6 (6) ◽  
pp. 127
Author(s):  
Ed Herranz ◽  
James Gentle ◽  
George Wang

Many financial time series are nonstationary and are modeled as ARIMA processes; they are integrated processes (I(n)) which can be made stationary (I(0)) via differencing n times. I(1) processes have a unit root in the autoregressive polynomial. Using OLS with unit root processes often leads to spurious results; a cointegration analysis should be used instead. Unit root tests (URT) decrease spurious cointegration. The Augmented Dickey Fuller (ADF) URT fails to reject a false null hypothesis of a unit root under the presence of structural changes in intercept and/or linear trend. The Zivot and Andrews (ZA) (1992) URT was designed for unknown breaks, but not under the null hypothesis. Lee and Strazicich (2003) argued the ZA URT was biased towards stationarity with breaks and proposed a new URT with breaks in the null. When an ARMA(p,q) process with trend and/or drift that is to be tested for unit roots and has changepoints in trend and/or intercept two approaches that can be taken: One approach is to use a unit root test that is robust to changepoints. In this paper we consider two of these URT's, the Lee-Strazicich URT and the Hybrid Bai-Perron ZA URT(Herranz, 2016.)  The other approach we consider is to remove the deterministic components with changepoints using the Bai-Perron breakpoint detection method (1998, 2003), and then use a standard unit root test such as ADF in each segment. This approach does not assume that the entire time series being tested is all I(1) or I(0), as is the case with standard unit root tests. Performances of the tests were compared under various scenarios involving changepoints via simulation studies.  Another type of model for breaks, the Self-Exciting-Threshold-Autoregressive (SETAR) model is also discussed.


2004 ◽  
Vol 30 (2) ◽  
Author(s):  
Daniel Almeida Fonseca ◽  
José Luís Oreiro

O artigo pretende analisar em que medida os modelos neoclássicos de crescimento econômico – mais especificamente, o modelo de Solow (1956, 1957), o modelo de Mankiw, Romer e Weill (1992) e o modelo de Romer (1990) – são capazes de explicar a divergência global nos níveis de renda per capita nos últimos dois séculos e a convergência nos níveis de renda per capita e o catch-up ocorridos entre Europa e Estados Unidos no período do Pós Segunda Guerra Mundial. Com efeito, trata-se de uma confrontação entre teoria e prática, de modo a analisar de que forma tais modelos explicam (ou não) os fatos supramencionados. No trabalho, demonstra-se que a ocorrência dos fatos anteriormente mencionados deveu-se fundamentalmente às diferenças do progresso técnico existente entre as economias (no caso da divergência) e à redução de tais disparidades entre os Estados Unidos e a Europa no período de tempo imediatamente após a 2.a Guerra Mundial (no caso da convergência e do catch-up). Na verdade, tenta-se demonstrar que os modelos apresentados não conseguem explicar satisfatoriamente os fatos ocorridos, sendo válidos apenas em casos específicos. O que o artigo se propõe a expor é que a realidade do crescimento econômico mundial é bastante diferente das conclusões dos modelos neoclássicos considerados. Abstract This work intends to analyze in which way the neoclassical growth models – more specifically, Solow (1956, 1957), Mankiw, Romer and Weill (1992) and Romer (1990) – are capable to explain the global divergence on the levels of per capita income over the last two centuries and the convergence on the levels of per capita income and the catch-up occurred between Europe and the United States after World War II. In fact, it is a confrontation between theory and practice, in order to view in which way these models explain (or not) the above-mentioned facts. During the present work, we demonstrate that the occurrence of these facts were mainly caused by differences on technological progress between economies (case of divergence) and the reduction of such disparities between the United States and Europe on the period of time immediately after World War II (case of convergence and catch-up). In fact, we try to demonstrate that these models are incapable to give a satisfactory explanation to the occurred facts, being only valid on specific cases. The work tries to propose that the reality of global economic growth differs considerably from the conclusions of the considered neoclassical growth models.


Tempo Social ◽  
2018 ◽  
Vol 30 (3) ◽  
pp. 67-84
Author(s):  
Stefan Klein ◽  
Ricardo Pagliuso Regatieri

In the early 1940s, critical theory borrowed the term racket from the urban crime underworld and applied it to criticize monopoly capitalism, which was regarded as a constellation ruled in a mafia-like manner. Decades later, after the experiences of the welfare state in the core counties and catch-up modernizations in the periphery, concepts such as cronyism and mafioso state were proposed. What these three approaches have in common is the fact that they highlight the mafia-like nature of capitalism and do so for different social and historical contexts. This article suggests that rackets, cronies or mafias have more recently, and increasingly, become structural elements of capitalism, as was first envisaged by critical theory during World War ii. We combine theoretical critique and insights with references to empirical expressions of this phenomenon to shed light on this development.


1986 ◽  
Vol 46 (2) ◽  
pp. 385-406 ◽  
Author(s):  
Moses Abramovitz

A widely entertained hypothesis holds that, in comparisons among countries, productivity growth rates tend to vary inversely with productivity levels. A century of experience in a group of presently industrialized countries supports this hypothesis and the convergence of productivity levels it implies. The rate of convergence, however, varied from period to period and showed marked strength only during the first quarter-century following World War II. The general process of convergence was also accompanied by dramatic shifts in countries' productivity rankings. The paper extends the simple catch-up hypothesis to rationalize the fluctuating strength of the process and explores the connections between convergence itself and the relative success of early leaders and latecomers.


2020 ◽  
Vol 57 (1) ◽  
pp. 85-87
Author(s):  
Moawia Alghalith

SummaryWe show that, in practice, the standard unit root tests, cointegration tests, and similar tests are unreliable. This conclusion is more generally applicable to other related regression-based tests. In particular, these tests attempt to solve a problem by creating another problem.


Author(s):  
Arno Tausch ◽  
Leonid Grinin ◽  
Andrey Korotayev

In 1937, the Japanese economist Kaname Akamatsu discovered specific links between the rise and decline of the global peripheries. Akamatsu’s theory of development describes certain mechanisms whose working results in the narrowing of the gap between the level of development of the economy of developing and developed countries, and, thus, in the re-structuring of the relationships between the global core and the global periphery. Akamatsu developed his model on the basis of his analysis of the economic development of Japan before World War II, with a special emphasis on the development of the Japanese textile industry. Akamatsu’s catch-up development includes three phases: import of goods, organization of the production of previously imported products, and export of those goods. This model proved to be productive for analyzing the development of many other developing countries, especially in East Asia, making the theory of flying geese popular among the economists of these countries, as well as the whole world. The “flying geese” model produces certain swings that may be denoted as Akamatsu waves. Akamatsu waves may be defined as cycles (with a period ranging from 20 to 60 years) that are connected with convergence and divergence of core and periphery of the World System in a way that explains cyclical upward and downward swings (at global and national levels) in the movements of the periphery countries as they catch up with the richer ones.


Author(s):  
Miguel Dorta ◽  
Gustavo Sanchez

In this article, we introduce the command bsrwalkdrift, which is primarily intended to perform a bootstrap unit-root test under the null hypothesis of random walk with drift. The method implemented in this command is considerably more precise than the corresponding case of the conventional augmented Dickey–Fuller test, which can be inaccurate when the true value of the drift term is small relative to the standard deviation of the innovations. The command also has an option to account for deterministic linear trend and another option to perform bootstrap unit-root tests under the null hypothesis of random walk without drift.


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