Quantifying International Tax Avoidance: A Review of the Academic Literature

This paper provides a brief review of the academic literature that assesses the quantitative importance of tax avoidance behaviour of multinational entities (MNEs) by means of income shifting from high-tax to low-tax affiliates. Existing studies unanimously report evidence in line with tax-motivated profit shifting (despite using different data sources and estimation strategies). In terms of shifting channels, there is evidence consistent with strategic mispricing of intra-firm trade, the location of valuable intellectual property at low-tax affiliates and debt-shifting activities. The quantitative estimates vary across approaches and studies though. The paper moreover stresses that some care should be warranted when interpreting profit shifting estimates as they often rely on non-trivial assumptions.