//-->
An examination of convergence hypothesis for EU-15 countries
Ceylan, Reşat, (2016)
Convergence of per capita energy consumption around the world : new evidence from nonlinear panel unit root tests
Romero-Ávila, Diego, (2022)
Nonlinearity, structural breaks, or outliers in economic time series?
Koop, Gary, (2000)
Are income differences within the OECD diminishing? : evidence from Fourier unit root tests
King, Alan, (2014)
Is Africa actually developing?
King, Alan, (2015)
Is Latin America catching up? : a time-series approach
King, Alan, (2008)