In a drive to encourage risk-taking, entrepreneurship and competitive fiscal advantage, many OECD countries have reformed their personal income tax system fundamentally over the last two decades, generally in ways that can be characterised as rate reducing and base broadening. This comprehensive...

Base erosion constitutes a serious risk to tax revenues, tax sovereignty and tax fairness for many countries. While there are many ways in which domestic tax bases can be eroded, a significant source of base erosion is profit shifting. This report presents the studies and data available...

This study considers advantages of relying on micro-data to assess average tax rates on labour, capital and transfer income and presents some illustrative results. The analysis emphases the importance of matching taxpayer-level information to income flows, and notes difficulties in interpreting...