Top income shares have increased significantly in some rich countries, but not so much in others. In the United States the fraction of income going to the top 1% has more than doubled since the late 1970s. And while top shares have increased in other countries like Canada and the United Kingdom, they have not gone up all that much elsewhere, say in Germany or Sweden.
Globalization and technological change are often said to be the causes of growing inequality, but all rich countries have been confronted by these forces, and on their own they cannot account for the variation in top income shares between countries. A full explanation has to rely on institutions, policies, or norms of pay that differ across national boundaries.
The first and most obvious place to look is at changes in tax rates.
Continue reading “Do falling tax rates explain the rising incomes of the top 1%?”


