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...

Recent research on the unobserved economy suggests that the phenomenon has important implications for both macroeconomic policy and public finance. Attention is focused on the public finance implications by developing a simple macro model from which it is possible to derive a Laffer curve. The...

The method of "excess sensitivity" of Bajada (1999, 2001, 2002) indicates a large underground economy in Australia, with estimates of unrecorded income around 15 per cent of official GDP. These estimates concern policymakers, especially those agencies responsible for national accounts, tax...

The present paper uses a survey of 1062 Czechs and 524 Slovaks to ask why people evade taxes. We maintain that the Czech and Slovak Republics are “twins” separated at birth and that divergences between these countries since their separation in 1992 can explain divergences in their rates of...

We use a dataset of 1062 individuals from the Czech Republic to forecast the evolution of tax evasion in that country. We ask each respondent how intensely (never, sometimes, often) he evaded taxes in 1995, 1999, and 2000, to calculate probabilities the average individual will move between these...

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...

This paper examines alternative specifications of a general currency ratio (GCR)model used to obtain macroeconomic estimates of the size and growth of the 'underground economy'. Tanzi's approach to estimating the underground economy is shown to be a variation of the GCR model. However both his...

This paper examines the size and implications of the Underground Economy in the US.

This paper is inscribed in the literature on fiscal fraud and moral of taxpayers. We analyse the attitude of the Spaniards respect to two kinds of fraud: the hiding of income to pay less taxes and the hiding of information to benefit fraudulently from goods and services that otherwise one would...