Özet:

The problem of non-equal distribution of income between countries and countries across the globe comes at the forefront of the issues to be solved. As predicted in the Neoclassical Growth Model, the income of low-income countries is closer to the income of high-income countries over time. The validity of this phenomenon, called the approximation hypothesis, gives an idea of how much the problem of income distribution is resolved. With this study, the approximation hypothesis panel is analyzed by the root test of the unit by using income data per person covering the years 1999-2018 for the G20 countries. The data used in the study was obtained from the official statistical database of the World Bank. First, it was examined whether there was horizontal cut dependency in the series. For the series that have been detected dependency of horizontal cut, the CADF unit root test developed by Pesaran (2007) has been applied. The hypothesis that the series contains a unit root for the panel in general is not rejected. This result provides evidence that it is not close to the G20 countries. According to the individual test results, only for Canada, Indonesia and Mexico the unit root hypothesis is rejected, which means the process is stopped in these countries. In other words, the overall outcomes are supporting, and the conclusion is that only 3 countries are close and other 17 countries are not individually close.