International corporate tax issues are now prominent in public debate, most notably with the current G20-OECD project addressing Base Erosion and Profit Shifting ('BEPS'). But, while there is considerable empirical evidence for advanced countries on the cross-country fiscal externalities at the heart of these issues, there is almost none for developing countries. This paper uses panel data for 173 countries over 33 years to explore the magnitude and nature of international fiscal externalities, with a particular focus on developing countries and applying a new method enabling a distinguishing between spillover effects through real investment decisions and through avoidance techniques-and quantification of the revenue impact of the latter. The results suggest that spillover effects on the tax base are substantially larger in developing countries than in advanced, and that they imply a likely loss of revenue from BEPS that is both substantially larger for them.

SummaryThis paper performs a meta-analysis of empirical estimates of uncompensated labour supply elasticities. For the Netherlands, we find that an elasticity of 0.5 for women and 0.1 for men is a good reflection of what the literature reveals. The elasticity for men hardly differs between countries, but for women some cross-country variation is found. The increasing participation rate of women may lead to a somewhat lower elasticity in the future. Both the specification of the hours function and the estimation method are found to affect elasticity estimates.

Corporate taxes exert a variety of effects on business behaviour. A wealth of empirical evidence assesses the magnitude of these behavioural margins of taxation. This article offers an up-to-date review and aims to provide common ground by computing for each distortion the semi-elasticity of the corporate tax base. We pay particular attention to international investment where it is not a priory clear whether marginal investment decisions or discrete locations are most important. Using an extension of the meta analysis of De Mooij and Ederveen (2003), we explore the extent to which existing studies reveal differences in effect size between the intensive and extensive margins of international investment.

International corporate tax issues are now prominent in public debate, most notably with the current G20-OECD project addressing Base Erosion and Profit Shifting ('BEPS'). But, while there is considerable empirical evidence for advanced countries on the crosscountry fiscal externalities at the heart of these issues, there is almost none for developing countries. This paper uses panel data for 173 countries over 33 years to explore the magnitude and nature of international fiscal externalities, with a particular focus on developing countries and applying a new method enabling a distinguishing between spillover effects through real investment decisions and through avoidance techniques-and quantification of the revenue impact of the latter. The results suggest that spillover effects on the tax base are substantially larger in developing countries than in advanced, and that they imply a likely loss of revenue from BEPS that is both substantially larger for them.

This paper explores how an environmental tax reform impacts pollution, economic growth and welfare in an endogenous growth model with pre-existing tax distortions. We find that a shift in the tax mix away from output taxes towards pollution taxes may raise economic growth through two channels. The first channel is an environmental production externality, which determines :he positive effect of lower aggregate pollution on the productivity of capital. The second channel is a shift in the tax burden away from the net return on investment towards profits. The paper also shows that the optimal tax on pollution may exceed its Pigovian level if tax-shifting towards profits is large and production externalities are important.

This paper reviews the rapidly growing empirical literature on international tax avoidance by multinational corporations. It surveys evidence on main channels of corporate tax avoidance including transfer mispricing, international debt shifting, treaty shopping, tax deferral and corporate inversions. Moreover, it performs a meta analysis of the extensive literature that estimates the overall size of profit shifting. We find that the literature suggests that, for the most recent year, a 1 percentage-point lower corporate tax rate compared to other countries will expand before-tax income by 1.5 percent-an effect that is larger than reported as the consensus estimate in previous surveys and tends to be increasing over time. The literature on tax avoidance still has several unresolved puzzles and blind spots that require further research.

Understanding the impact of the asymmetric tax treatment of debt and equity on the capital structures of financial institutions is critical to shaping and assessing responses to the problem of excessive leverage that underlay the 2009 financial crisis-but there is no empirical evidence to draw on. Guided by a simple model of banks' financing decisions in the presence of both regulatory constraints and tax asymmetries, this paper explores the impact of corporate tax bias on bank leverage, the use of hybrid instruments and regulatory capital ratios for a panel of over 14,000 commercial banks in 82 countries over nine years. On average, the sensitivity of banks' debt choices proves very similar to that of non-financial firms, consistent with rough offsetting of two opposing effects suggested by the theory. As the model predicts, somewhat counter-intuitively, the impact of tax on hybrids is generally weak or insignificant. Responsiveness to taxation varies significantly across banks, however: those holding smaller equity buffers, and larger banks, are noticeably less sensitive to tax.

By how much will faster economic growth boost government revenue? This paper estimates short-and long-run tax buoyancy in OECD countries between 1965 and 2012. We find that, for aggregate tax revenues, short-run tax buoyancy does not significantly differ from one in the majority of countries; yet, it has increased since the late 1980s so that tax systems have generally become better automatic stabilizers. Long-run buoyancy exceeds one in about half of the OECD countries, implying that GDP growth has helped improve structural fiscal deficit ratios. Corporate taxes are by far the most buoyant, while excises and property taxes are the least buoyant. For personal income taxes and social contributions, short-and long-run buoyancies have declined since the late 1980s and have, on average, become lower than one.