This report provides estimates of the VAT Gap for 26 EU Member States for 2013, as well as revised estimates for the period 2009-2012. It is a follow-up to the report “Study to quantify and analyse the VAT Gap in the EU-27 Member Statess, published in September 2013 (hereafter: 2013 Report),...

This report provides estimates of the VAT Gap for 26 EU Member States for 2012, as well as revised estimates for the period 2009-2011. It is a follow-up to the report "Study to quantify and analyse the VAT Gap in the EU-27 Member States", published in September 2013. This update incorporates the...

This report presents and discusses the findings of the "Study to quantify and analyse the VAT Gap in the EU-27 Member States", conducted by CASE and CPB. The main aim of the study was to help better understand the recent trends in the field of VAT fraud and analyse determinants of VAT Gaps using...

This paper re-examines the individual income tax evasion decision in the simple framework introduced by Allingham and Sandmo (1972), where the individual taxpayer decides how much of his income is invested in a safe asset (reported income) and in a risky asset (concealed income). These early...

In 1969, Shoup postulated that the presence of interrelated taxes in a tax system would reinforce the system of tax penalty ("self-reinforcing penalty system of taxes"). In this paper, we have tried to formally develop this idea. We find that in order that tax re-enforcement holds, it is...

We develop a moral hazard model with auditing where both the principal and the agent can influence the probability that the true state of nature is verified. This setting is widely applicable for situations where fraudulent reporting with costly state verification takes place. However, we use...

This paper investigates multi-item moral hazard with auditing contests. Although the presented model is widely applicable, we choose tax evasion as an exemplary application. We introduce a tax-evasion model where tax authority and taxpayer invest in detection and concealment. The taxpayers have...