Slemrod, Joel B.; Kopczuk, Wojciech; Yitzhaki, Shlomo - 2021
An optimal linear world income tax that maximizes a border-neutral social welfare function provides a drastic reduction … in world consumption inequality, dropping the Gini coefficient from 0.69 to 0.25. In contrast an optimal decentralized (i ….e., within countries) redistribution has miniscule effect on world income inequality. Thus, the traditional public finance …