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IEB

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2017/15: Spillover from the haven: cross-border externalities of patent box regimes within multinational firms

In this paper, we analyze the cross-border effects of patent box regimes that reduce the tax rate on income from intellectual property. We argue that the tax cut in one location of a multinational enterprise may reduce the user cost of capital for the whole group if profit shifting is possible. This spillover effect of the foreign tax cut raises domestic R&D investment. We test this mechanism by combining information on patents, firm ownership and specific characteristics of patent box regimes. Empirical results from a micro-level analysis suggest that patent box regimes without a nexus requirement (patent havens) induce positive cross-border externalities on R&D activity within multinational groups. For firms with cross-border links, the implementation of a foreign patent haven increases domestic research activity by about 2.3% per implied tax rate differential. Furthermore, our findings suggest that patent boxes generate negative spillovers on average patent quality. This has important implications for international tax policy and the evaluation of patent box regimes.

2017/10: The elasticity of taxable income: A meta-regression analysis

The elasticities of taxable (ETI) and broad income (EBI) are key parameters in optimal tax and welfare analysis. To examine the large variation in estimates found in the literature, I conduct a comprehensive meta-regression analysis of elasticities that measure behavioral responses to income taxation using information from 51 different studies containing 1,420 estimates. I find that heterogeneity in reported estimates is driven by regression techniques, sample restrictions and variations across countries and time. Moreover, I provide descriptive evidence of the correlation between contextual factors and the magnitude of an elasticity estimate. Overall, the study confirms the fact that the ETI itself is endogenous to the underlying tax system. I also document that selective reporting bias is prevalent in the literature. The direction of reporting bias depends on whether or not deductions are included in the tax base.

2017/06: Taxing high-income earners: tax avoidance and mobility

The taxation of high-income earners is of importance to every country and is the subject of a considerable amount of recent academic research. Such high-income earners contribute substantial amounts of tax and generate significant positive spillovers, but are also highly mobile: a 1% increase in the top marginal income tax rate increases out- migrations by around 1.5 to 3%. We review research into taxation of high-income earners to provide a synthesis of existing theoretical and empirical understanding. We offer various avenues for potential future theoretical and empirical research.

Alex Rees-Jones

«Heuristic perceptions of the income tax: evidence and implications for debiasing»

Miguel Almunia

«Information, fiscal capacity and tax compliance: An experimental evaluation in Uganda»

Pierre Bachas

«Not(ch) your average tax rate: corporate taxation under weak enforcement»