Hossain, Md. Sharif; Saeki, Chikayoshi - 2012
for five different panels (namely high income, upper middle income, lower middle income, low income based on World Bank … income classification and global) using time series data from 1960 to 2008. Three panel unit root tests results support that … both the variables are integrated of order 1 for all panels except low income panel. Only the variable economic growth is …