In a simple cash-credit model, I study the effects of the combination of costly tax collection and tax evasion on fiscal and monetary policy for optimal resource allocation. Allowing the informal sector to use cash more intensively than the formal sector, I compute the optimal interest and tax...

This paper develops a competition theory framework that evaluates an important aspect of the OECD's Harmful Tax Practices Initiative against tax havens. We show that the sequential nature of the process is harmful and more costly than a "big bang" multilateral agreement. The sequentiality may...

For the first time we develop a time series of tax evasion (in % of official GDP) for 38 OECD countries over the period 1999 to 2010 based on MIMIC model estimations of the shadow economy. Considering indirect taxation and self-employment as the driving forces of tax evasion, we observe a...

For the first time we develop a time series of tax evasion (in % of official GDP) for 38 OECD countries over the period 1999 to 2010 based on MIMIC model estimations of the shadow economy. Considering indirect taxation and self-employment as the driving forces of tax evasion, we observe a...

Tax avoidance by major multinational enterprises (MNEs) has been extremely topical after the great financial crisis of 2008. As a result, the Organisation for Economic Cooperation and Development (OECD) in 2013 commenced a project known as the “base erosion and profit shifting” (BEPS)...

Following the financial crisis and ensuing austerity, politicians discovered the problem of tax avoidance. In response, the OECD and G20 launched the Base Erosion and Profit Shifting (BEPS) project in 2013, and this has in October, 2015 culminated with the release of a series of action steps...

The Unified Approach issued by the OECD Secretariat on Oct 9, 2019, is the OECD's most recent attempt to find international consensus on BEPS Action Item 1, “Taxing the Digital Economy.” Our assessment is that the Pillar One proposals in the Unified Approach suffer from several defects, the...

In its 2015 Final Report on “Measuring and Monitoring BEPS, Action 11”, the OECD introduced six indicators to quantify and evaluate base erosion and profit shifting (BEPS) activity over time. In this study, we revisit three selected indicators, provide a numerical update for recent periods...

This paper develops a differential game of tax avoidance by modelling the interactions between a taxpayer and the tax authority. This framework is particularly useful for explicitly modelling situations of conflict. The solution to the game is a non-co-operative Nash that depends on the...

As part of its action plan against base erosion and profit shifting (BEPS), the OECD (2015) has proposed six indicators to measure profit shifting activity. These indicators add to past and ongoing efforts in academic tax research to empirically identify the scale and tax sensitivity of...