Testing Hysteresis in Unemployment in G7 Countries Using Quantile Unit Root Test with both Sharp Shifts and Smooth Breaks

2018 ◽  
Vol 142 (3) ◽  
pp. 1211-1229 ◽  
Author(s):  
Yushi Jiang ◽  
Yifei Cai ◽  
Yi-Ting Peng ◽  
Tsangyao Chang
Keyword(s):  
Unit Root ◽  
Unit Root Test ◽  
G7 Countries ◽  
Smooth Breaks

Convergence in per capita carbon footprint and ecological footprint for G7 countries: Evidence from panel Fourier threshold unit root test

2021 ◽  
pp. 0958305X2110114
Author(s):  
Veli Yilanci ◽  
Muhammed Sehid Gorus ◽  
Sakiru Adebola Solarin
Keyword(s):  
Unit Root ◽  
Structural Breaks ◽  
Structural Changes ◽  
Unit Root Test ◽  
G7 Countries ◽  
Convergence Hypothesis ◽  
International Climate ◽  
Per Capita ◽  
Nonlinear Behaviors ◽  
Nonlinear Unit Root Tests

This paper aims to explore the convergence of per capita carbon and ecological footprints in G7 countries during 1961–2016. For this purpose, we propose a new unit root test in the panel setting–the panel Fourier threshold unit root test. This test takes into consideration both multiple smooth structural changes and nonlinearity. According to the literature, the power of the nonlinear unit root tests is reduced in the case of ignoring structural breaks. Therefore, we expect to get more reliable empirical findings by utilizing this methodology. The empirical results of this paper show that these series have nonlinear behaviors for the period 1961–2016. Furthermore, they demonstrate that the absolute convergence hypothesis is valid in G7 countries for both regimes. Thus, governments can conduct common environmental policies, including international climate summits and agreements, instead of national-based policies to mitigate environmental deterioration in their countries.

CO2 emissions converge in China and G7 countries? Further evidence from Fourier quantile unit root test

2019 ◽  
Vol 31 (2) ◽  
pp. 348-363 ◽  
Author(s):  
Cuihong Ye ◽  
Yiguo Chen ◽  
Roula Inglesi-Lotz ◽  
Tsangyao Chang
Keyword(s):  
Unit Root ◽  
Unit Root Test ◽  
The United States ◽  
Test Point ◽  
Policy Implications ◽  
Test Results ◽  
G7 Countries ◽  
Empirical Results ◽  
The United Kingdom ◽  
Per Capita

G7 countries and China are considered not only the biggest energy producers globally but also the largest CO2 emission groups of countries among the world. In this study, we apply the Fourier quantile unit root test to investigate whether CO2 emissions converge in China and G7 countries using per capita CO2 emissions data over 1950–2013. While traditional unit root test results indicate that per capita CO2 emissions do not converge among these G7 countries and China, empirical results from the Fourier quantile unit root test point out that the CO2 emissions did converge in Germany, Italy, and the United Kingdom. Although the results of this study do not find strong CO2 emission convergence in the other five countries (i.e., Canada, France, Japan, the United States, and China), the CO2 emissions did converge in certain quantiles for these five countries. Our empirical results have important policy implications for the governments of G7 countries and China to implement the effective energy policy to reduce the CO2 emissions.

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