The Covid-19 pandemic highlights the pressing need to address common challenges faced by all countries and, in particular, provide special support to developing countries through international cooperation. Taxation, in particular Value Added Tax (VAT), is a key area for strengthening international cooperation because of its critical role in financing the Covid-19 crisis and supporting global recovery. This paper proposes the adoption of VAT treaties based on two considerations. First, there exist, in the interplay between states’ VAT laws, over-taxation and under-taxation that can be more effectively addressed by treaties than by unilateral state actions. Secondly, unlike income tax treaties, VAT treaties would distribute more benefits from cooperation to developing countries than to developed countries, leading to normatively attractive distributional consequences. The proposed model offers a new approach to taxing cross-border transactions under VAT and could form part of a coordinated response to a sustainable post-pandemic recovery.

Economic arguments in support of linking emissions trading schemes suggest that such linking could provide access to lower cost abatement options and increase market stability. The decisions of whether and how to link emissions trading schemes often focus on the design features of the relevant schemes, but an additional factor which has the potential to undermine the efficiency of linked schemes is taxation. This article systematically tests two alternative approaches to the direct (income) taxation of cross-border transfers of emission allowances for differential tax outcomes. Four hypothetical transactions are considered under three different linking mechanisms and on the assumption that a tax treaty based on the OECD Model Tax Convention on Income and on Capital is in force. This analysis evidences that, in some cases – and especially if the relevant jurisdictions adopt different approaches to the taxation of allowance transactions under domestic law – there is the potential for timing differences or double taxation that could impact on the efficiency of the linked trading schemes. It is therefore important for tax implications to be considered as part of any linking proposal.