The literature on income inequality includes many studies that have tried to identify factors such as level of economic development, rate of economic growth, population growth, resource endowment, price instability, and openness as main determinant of income inequality. In this paper, we show...

The primary purpose of this article is to conduct the Fourier Nonlinear Unit Root Test to check Purchasing Power Parity (PPP) for seven cryptocurrencies traded in seventeen countries from 2010 to 2021. The unit root test provides moderate support to the PPP hypothesis when we use each...